Merged revisions 322484 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r322484 | rmudgett | 2011-06-08 15:46:55 -0500 (Wed, 08 Jun 2011) | 15 lines
  
  Ring all queue with more than 255 agents will cause crash.
  
  1. Create a ring-all queue with 500 permanent agents.
  2. Call it.
  3. Asterisk will crash.
  
  The watchers array in app_queue.c has a hard limit of 255.  Bounds
  checking is not done on this array.  No sane person should put 255 people
  in a ring-all queue, but we should not crash anyway.
  
  * Added bounds checking to the watchers array.
  
  JIRA AST-464
  JIRA SWP-2903
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@322485 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -3482,7 +3482,9 @@ static struct callattempt *wait_for_answer(struct queue_ent *qe, struct callatte
 				if (o->stillgoing) {	/* Keep track of important channels */
 					stillgoing = 1;
 					if (o->chan) {
-						watchers[pos++] = o->chan;
+						if (pos < AST_MAX_WATCHERS) {
+							watchers[pos++] = o->chan;
+						}
 						if (!start)
 							start = o;
 						else