[lldb] Fix off-by-one error in the AppleObjCRuntimeV2 utility function

Fix an off-by-one error in the utility function used to extract the
dynamic class info. This resulted in a buffer overflow in the inferior
which interrupted our utility function.

Differential revision: https://reviews.llvm.org/D128377

Author: JDevlieghere

lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCRuntimeV2.cpp

@@ -199,7 +199,7 @@ __lldb_apple_objc_v2_get_dynamic_class_info2(void *gdb_objc_realized_classes_ptr
     DEBUG_PRINTF ("count = %u\n", count);
 
     uint32_t idx = 0;
-    for (uint32_t i=0; i<=count; ++i)
+    for (uint32_t i=0; i<count; ++i)
     {
         if (idx < max_class_infos)
         {
@@ -273,7 +273,7 @@ __lldb_apple_objc_v2_get_dynamic_class_info3(void *gdb_objc_realized_classes_ptr
     DEBUG_PRINTF ("count = %u\n", count);
 
     uint32_t idx = 0;
-    for (uint32_t i=0; i<=count; ++i)
+    for (uint32_t i=0; i<count; ++i)
     {
         if (idx < max_class_infos)
         {