Update StreamingController.pm

Updated based on feedback from @michaelherger and @philippe44.

Slim/Player/StreamingController.pm

@@ -922,9 +922,11 @@ sub _RetryOrNext {		# -> Idle; IF [shouldretry && canretry] THEN continue
 			_Stream($self, $event, {song => $song});
 			return;
 		} else {
-			if ($song->duration() - $elapsed < 10)		# check we have more than 10 seconds left to play.
+			$log->debug("Elapsed: " . $elapsed);
+			$log->debug("Duration: " . $song->duration());
+			if (!$elapsed || !$song->duration() || $song->duration() < $elapsed || $song->duration() - $elapsed < 10)		# check we have more than 10 seconds left to play.
 			{
-				if ( main::DEBUGLOG && $log->is_debug ) {$log->debug("Will not retry - track is within 10 seconds of end.")};
+				if ( main::DEBUGLOG && $log->is_debug ) {$log->debug("Will not retry - no player sync or track is within 10 seconds of end.")};
 			} else {
                         	# get seek data from protocol handler.
                         	if ( main::DEBUGLOG && $log->is_debug ) {$log->debug("Getting seek data from protocol handler.")};
@@ -1426,8 +1428,10 @@ sub _willRetry {
 
 	# Have we managed to play at least 10 seconds of a track and retried fewer times than there are intervals?
 	my $elapsed = $self->playingSongElapsed();
+	$log->debug("Elapsed: " . $elapsed);
+        $log->debug("Duration: " . $song->duration());
         if ($song->retryData->{'count'} > scalar @retryIntervals || !$elapsed || $elapsed < 10 ||
-                !$song->duration() || ($song->duration() - $elapsed < 10)) {
+                !$song->duration() || $song->duration() < $elapsed || ($song->duration() - $elapsed < 10)) {
 		if ( main::DEBUGLOG && $log->is_debug ) {$log->debug("Will not retry - no player sync, too many retries or track within 10 seconds of start or end.")};
 		return 0;
 	}