CC-4639:

Give an option to allow smart blocks to reuse tracks if not enough tracks meet the time limit

- fixed the bug where airtime hangs when repeat is checked but 0 files that
meet criteria
- fixed dynamic block bug where it didn't generate correct list

airtime_mvc/application/models/Block.php

@@ -1191,7 +1191,7 @@ SQL;
         $sizeOfInsert = count($insertList);
         
         // if block is not full and reapeat_track is check, fill up more
-        while (!$isBlockFull && $repeat == 1) {
+        while (!$isBlockFull && $repeat == 1 && $sizeOfInsert > 0) {
             $randomEleKey = array_rand(array_slice($insertList, 0, $sizeOfInsert));
             $insertList[] = $insertList[$randomEleKey];
             $totalTime += $insertList[$randomEleKey]['length'];