Include json_inttypes.h in json_object.h since we use types like int32_t in the API and some systems need that header to compile.
As part of this create a public json_config.h with a custom define to
decide whether to include inttypes.h to avoid conflicting with other
projects config.h header.
diff --git a/json_inttypes.h b/json_inttypes.h
index 1f3e4d2..b71bb09 100644
--- a/json_inttypes.h
+++ b/json_inttypes.h
@@ -2,6 +2,8 @@
#ifndef _json_inttypes_h_
#define _json_inttypes_h_
+#include "json_config.h"
+
#if defined(_MSC_VER) && _MSC_VER < 1600
/* Anything less than Visual Studio C++ 10 is missing stdint.h and inttypes.h */
@@ -14,7 +16,7 @@
#else
-#ifdef HAVE_INTTYPES_H
+#ifdef JSON_C_HAVE_INTTYPES_H
#include <inttypes.h>
#endif
/* inttypes.h includes stdint.h */