dahdi-base: Hide "Master changed to" message

Put the "Master changed to xxx/x/x" message behind a debug flag. It's an
implementation specific detail and has caused confusion with customers.
DAHDI-692

git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9299 a0bf4364-ded3-4de4-8d8a-66a801d63aff

drivers/dahdi/dahdi-base.c

@@ -3536,10 +3536,12 @@ void dahdi_alarm_notify(struct dahdi_span *span)
 		for (x=1; x<maxspans; x++) {
 			if (spans[x] && !spans[x]->alarms && (spans[x]->flags & DAHDI_FLAG_RUNNING)) {
 				if (master != spans[x]) {
+					if (debug) {
 						module_printk(KERN_NOTICE,
 						     "Master changed to %s\n",
 						     spans[x]->name);
 					}
+				}
 				master = spans[x];
 				break;
 			}