bugfix: we now only apply the lightuserdata mask on platforms that are at least 64bits.

Author: spacewander

lua_cjson.c

@@ -93,9 +93,14 @@
 #define strcasecmp _stricmp
 #endif
 
+#if LONG_MAX > ((1UL << 31) - 1)
 #define json_lightudata_mask(ludata)                                         \
     ((void *) ((uintptr_t) (ludata) & ((1UL << 47) - 1)))
 
+#else
+#define json_lightudata_mask(ludata)    (ludata)
+#endif
+
 static const char * const *json_empty_array;
 static const char * const *json_array;