Include ctype.h for tolower()

git-svn-id: http://svn.code.sf.net/p/cjson/code@28 e3330c51-1366-4df0-8b21-3ccf24e3d50e

cJSON.c

@@ -29,6 +29,7 @@
 #include <stdlib.h>
 #include <float.h>
 #include <limits.h>
+#include <ctype.h>
 #include "cJSON.h"
 
 static int cJSON_strcasecmp(const char *s1,const char *s2)