common/bolt11: fix 32-bit compilation.

Fixes d9fed06:

```
common/bolt11.c:868:31: error: format specifies type 'size_t' (aka 'unsigned long') but the argument has type 'u64' (aka 'unsigned long long') [-Werror,-Wformat]
                                           bech32_charset[type], field_len);
                                                                 ^~~~~~~~~
```

Signed-off-by: Rusty Russell <[email protected]>

Author: rustyrussell

common/bolt11.c

@@ -138,7 +138,7 @@ static struct bolt11 *decode_fail(struct bolt11 *b11, char **fail,
  */
 static const char *unknown_field(struct bolt11 *b11,
 				 struct hash_u5 *hu5,
-				 const u5 **data, size_t *field_len,
+				 const u5 **data, u64 *field_len,
 				 u5 type)
 {
 	struct bolt11_field *extra = tal(b11, struct bolt11_field);
@@ -157,7 +157,7 @@ static const char *unknown_field(struct bolt11 *b11,
  * Otherwise copy into dst without padding, set have_flag if non-NULL. */
 static const char *pull_expected_length(struct bolt11 *b11,
 					struct hash_u5 *hu5,
-					const u5 **data, size_t *field_len,
+					const u5 **data, u64 *field_len,
 					size_t expected_length,
 					u5 type,
 					bool *have_flag,
@@ -179,7 +179,7 @@ static const char *pull_expected_length(struct bolt11 *b11,
 static const char *decode_p(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_p)
 {
 	/* BOLT #11:
@@ -207,7 +207,7 @@ static const char *decode_p(struct bolt11 *b11,
 static const char *decode_d(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_d)
 {
 	u8 *desc;
@@ -236,7 +236,7 @@ static const char *decode_d(struct bolt11 *b11,
 static const char *decode_h(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_h)
 {
 	const char *err;
@@ -266,7 +266,7 @@ static const char *decode_h(struct bolt11 *b11,
 static const char *decode_x(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_x)
 {
 	const char *err;
@@ -290,7 +290,7 @@ static const char *decode_x(struct bolt11 *b11,
 static const char *decode_c(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_c)
 {
 	u64 c;
@@ -314,7 +314,7 @@ static const char *decode_c(struct bolt11 *b11,
 static const char *decode_n(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_n)
 {
 	assert(!*have_n);
@@ -335,7 +335,7 @@ static const char *decode_n(struct bolt11 *b11,
 static const char *decode_s(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_s)
 {
 	const char *err;
@@ -364,7 +364,7 @@ static const char *decode_s(struct bolt11 *b11,
 static const char *decode_f(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_f)
 {
 	u64 version;
@@ -466,7 +466,7 @@ static void towire_route_info(u8 **pptr, const struct route_info *route_info)
 static const char *decode_r(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_r)
 {
 	const u8 *r8;
@@ -518,7 +518,7 @@ static void shift_bitmap_down(u8 *bitmap, size_t bits)
 static const char *decode_9(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_9)
 {
 	size_t flen = (*field_len * 5 + 7) / 8;
@@ -565,7 +565,7 @@ static const char *decode_9(struct bolt11 *b11,
 static const char *decode_m(struct bolt11 *b11,
 			    const struct feature_set *our_features,
 			    struct hash_u5 *hu5,
-			    const u5 **data, size_t *field_len,
+			    const u5 **data, u64 *field_len,
 			    bool *have_m)
 {
 	const char *err;
@@ -617,7 +617,7 @@ struct decoder {
 	const char *(*decode)(struct bolt11 *b11,
 			      const struct feature_set *our_features,
 			      struct hash_u5 *hu5,
-			      const u5 **data, size_t *field_len,
+			      const u5 **data, u64 *field_len,
 			      bool *have_field);
 };
 
@@ -864,7 +864,7 @@ struct bolt11 *bolt11_decode_nosig(const tal_t *ctx, const char *str,
 		if (problem)
 			return decode_fail(b11, fail, "%s", problem);
 		if (field_len)
-			return decode_fail(b11, fail, "%c: extra %zu bytes",
+			return decode_fail(b11, fail, "%c: extra %"PRIu64" bytes",
 					   bech32_charset[type], field_len);
 	}