Use event2str consisitently in chan_zap anytime we are printing debug info about an event (bug 2548)

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/v1-0@3873 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -7355,7 +7355,7 @@ static void *pri_dchannel(void *vpri)
 					x = 0;
 					res = ioctl(pri->fds[which], ZT_GETEVENT, &x);
 					if (x) 
-						ast_log(LOG_NOTICE, "PRI got event: %d on %s D-channel of span %d\n", x, pri_order(which), pri->span);
+						ast_log(LOG_NOTICE, "PRI got event: %s (%d) on %s D-channel of span %d\n", event2str(x), x, pri_order(which), pri->span);	
 					/* Keep track of alarm state */	
 					if (x == ZT_EVENT_ALARM) {
 						pri->dchanavail[which] &= ~(DCHAN_NOTINALARM | DCHAN_UP);