Logger: Convert 'struct ast_callid' to unsigned int.

Switch logger callid's from AO2 objects to simple integers.
This helps in two ways.  Copying integers is faster than
referencing AO2 objects, so this will result in a small
reduction in logger overhead.  This also erases the possibility
of an infinate loop caused by an invalid callid in
threadstorage.

ASTERISK-24833 #comment Committed callid conversion to trunk. 
Reported by: Corey Farrell
Review: https://reviewboard.asterisk.org/r/4466/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@432834 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/dial.c

@@ -56,7 +56,7 @@ struct ast_dial {
 	void *user_data;                                   /*!< Attached user data */
 	AST_LIST_HEAD(, ast_dial_channel) channels; /*!< Channels being dialed */
 	pthread_t thread;                                  /*!< Thread (if running in async) */
-	struct ast_callid *callid;                         /*!< callid pointer (if running in async) */
+	ast_callid callid;                                 /*!< callid (if running in async) */
 	ast_mutex_t lock;                                  /*! Lock to protect the thread information above */
 };
 
@@ -1118,11 +1118,6 @@ int ast_dial_destroy(struct ast_dial *dial)
 	/* Lock be gone! */
 	ast_mutex_destroy(&dial->lock);
 
-	/* Get rid of the reference to the ast_callid */
-	if (dial->callid) {
-		ast_callid_unref(dial->callid);
-	}
-
 	/* Free structure */
 	ast_free(dial);