fix build err

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10016 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/include/switch_utils.h

@@ -377,7 +377,7 @@ SWITCH_DECLARE(switch_time_t) switch_str_time(const char *in);
   \param vname the name of the global pointer to modify with the new function
 */
 #define SWITCH_DECLARE_GLOBAL_STRING_FUNC(fname, vname) static void fname(const char *string) { if (!string) return;\
-		if (vname) {free(vname); vname = NULL;}vname = strdup(string);} static void fname(char *string)
+		if (vname) {free(vname); vname = NULL;}vname = strdup(string);} static void fname(const char *string)
 
 /*!
   \brief Separate a string into an array based on a character delimeter