MFC r354991-r354992 (by lwhsu)

r354991:
Fix GCC build.

Sponsored by:	The FreeBSD Foundation

r354992:
Initialize variable bitstr

r354991 removed variable-sized object initializing on defining.  For the safe
reason, manually initialize the members to 0.

Sponsored by:	The FreeBSD Foundation

Author: rlibby

tests/sys/sys/bitstring_test.c

@@ -347,9 +347,11 @@ ATF_TC_WITHOUT_HEAD(bit_ffs_area);
 ATF_TC_BODY(bit_ffs_area, tc)
 {
 	const int nbits = 72;
-	bitstr_t bit_decl(bitstr, nbits) = {};
+	bitstr_t bit_decl(bitstr, nbits);
 	int location;
 
+	memset(bitstr, 0, bitstr_size(nbits));
+
 	bit_set(bitstr, 5);
 	bit_set(bitstr, 6);
 
@@ -416,7 +418,7 @@ ATF_TC_WITHOUT_HEAD(bit_ffc_area);
 ATF_TC_BODY(bit_ffc_area, tc)
 {
 	const int nbits = 80;
-	bitstr_t bit_decl(bitstr, nbits) = {};
+	bitstr_t bit_decl(bitstr, nbits);
 	int location;
 
 	/* set all bits */