Fixed chan_skinny for systems were pthread_t isn't an int.

I'm looking at you, OS X.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@394156 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_skinny.c

@@ -8658,7 +8658,7 @@ static int unload_module(void)
 	struct skinny_line *l;
 	struct skinny_subchannel *sub;
 	struct ast_context *con;
-	int tempthread;
+	pthread_t tempthread;
 
 	ast_rtp_glue_unregister(&skinny_rtp_glue);
 	ast_channel_unregister(&skinny_tech);