simplify/fix lock retry, and fix comment

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@29764 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11199,7 +11199,7 @@ static int sipsock_read(int *id, int fd, short events, void *ignore)
 	int nounlock;
 	int recount = 0;
 	char iabuf[INET_ADDRSTRLEN];
-	int lockretrycount = 0;
+	unsigned int lockretry = 100;
 
 	len = sizeof(sin);
 	memset(&req, 0, sizeof(req));
@@ -11252,13 +11252,12 @@ retrylock:
 			ast_log(LOG_DEBUG, "Failed to grab lock, trying again...\n");
 			ast_mutex_unlock(&p->lock);
 			ast_mutex_unlock(&netlock);
-			/* Sleep infintismly short amount of time */
+			/* Sleep for a very short amount of time */
 			usleep(1);
-			lockretrycount++;
-			if (lockretrycount < 100)
+			if (--lockretry)
 				goto retrylock;
 		}
-		if (lockretrycount > 100) {
+		if (!lockretry) {
 			ast_log(LOG_ERROR, "We could NOT get the channel lock for %s! \n", p->owner->name);
 			ast_log(LOG_ERROR, "SIP MESSAGE JUST IGNORED: %s \n", req.data);
 			ast_log(LOG_ERROR, "BAD! BAD! BAD!\n");