Some updates to make the code compatible with VC 9 (2008)

VC 9 doesn't support late variable declarations, and doesn't have inttypes
so we need some direct definitions of a couple of more types.

json_inttypes.h

@@ -5,6 +5,9 @@
 #if defined(_MSC_VER) && _MSC_VER < 1600
 
 /* Anything less than Visual Studio C++ 10 is missing stdint.h and inttypes.h */
+typedef __int32 int32_t;
+#define INT32_MIN    ((int32_t)_I32_MIN)
+#define INT32_MAX    ((int32_t)_I32_MAX)
 typedef __int64 int64_t;
 #define PRId64 "I64d"
 #define SCNd64 "I64d"