Ignore ECHILD in app_system

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2266 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_system.c

@@ -53,13 +53,15 @@ static int system_exec(struct ast_channel *chan, void *data)
 	LOCAL_USER_ADD(u);
 	/* Do our thing here */
 	res = system((char *)data);
-	if (res < 0) {
+	if ((res < 0) && (errno != ECHILD)) {
 		ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
 		res = -1;
 	} else if (res == 127) {
 		ast_log(LOG_WARNING, "Unable to execute '%s'\n", (char *)data);
 		res = -1;
 	} else {
+		if (res < 0)
+			res = 0;
 		if (res && ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->callerid)) 
 			chan->priority+=100;
 		res = 0;