mod_commands: check for zstr(cmd) in escape_function

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@16029 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_commands/mod_commands.c

@@ -3866,8 +3866,15 @@ SWITCH_STANDARD_API(hupall_api_function)
 
 SWITCH_STANDARD_API(escape_function)
 {
-	int len = strlen(cmd)*2;
-	char *mycmd = malloc(strlen(cmd)*2);
+	int len;
+	char *mycmd;
+	
+	if (zstr(cmd)) {
+		return SWITCH_STATUS_SUCCESS;
+	}
+	
+	len = strlen(cmd)*2;
+	mycmd = malloc(len);
 	
 	stream->write_function(stream, "%s", switch_escape_string(cmd, mycmd, len));