Only re-add the io port if it was closed, otherwise reload causes a memory

leak.
(closes issue #13785)
 Reported by: eliel
 Patches: 
       chan_mgcp.c.patch uploaded by eliel (license 64)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@152442 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_mgcp.c

@@ -3431,8 +3431,9 @@ static void *do_monitor(void *data)
 			ast_verb(1, "Reloading MGCP\n");
 			reload_config(1);
 			/* Add an I/O event to our UDP socket */
-			if (mgcpsock > -1) 
+			if (mgcpsock > -1 && !mgcpsock_read_id) {
 				mgcpsock_read_id = ast_io_add(io, mgcpsock, mgcpsock_read, AST_IO_IN, NULL);
+			}
 		}
 
 		/* Check for interfaces needing to be killed */