Suppress compiler warning.

This code caused a compiler warning when --enable-dev-mode was not used.
The warning was that this variable was set but not used.  That was indeed
the case as the only place this is used is as an argument to SKINNY_DEBUG
which is compiled out when not in dev mode.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@383838 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_skinny.c

@@ -6254,12 +6254,14 @@ static int handle_stimulus_message(struct skinny_req *req, struct skinnysession
 	struct ast_channel *c;
 	int event;
 	int instance;
+#ifdef AST_DEVMODE
 	int callreference;
-	/*int res = 0;*/
+	/* This is only used in AST_DEVMODE, as an argument to SKINNY_DEBUG */
+	callreference = letohl(req->data.stimulus.callreference);
+#endif
 
 	event = letohl(req->data.stimulus.stimulus);
 	instance = letohl(req->data.stimulus.stimulusInstance);
-	callreference = letohl(req->data.stimulus.callreference);
 
 	/*  Note that this call should be using the passed in instance and callreference */
 	sub = find_subchannel_by_instance_reference(d, d->lastlineinstance, d->lastcallreference);