Merge pull request #85 from peti/dont-clutter-system-log-with-debug-messages

hydra-queue-runner: don't clutter the system log with debug message

src/script/hydra-queue-runner

@@ -103,9 +103,11 @@ sub checkBuilds {
                 { join => ['project'], order_by => ["priority DESC", "timestamp"],
                   rows => $extraAllowed });
 
+            if (scalar(@builds) > 0) {
               print "system type `", $system->system,
                   "': $nrActive active, $max allowed, ",
                   "starting ", scalar(@builds), " builds\n";
+            }
 
             foreach my $build (@builds) {
                 # Find a dependency of $build that has no queued