MDL-20184 when importing questions from Hot Potatoes files to Moodle …

…question-bank / Quiz module, the readquestions() function wil return "false", to signify an error, if no questions are detected in the import file

question/format/hotpot/format.php

@@ -102,7 +102,12 @@ function readquestions ($lines) {
                     notice("Unknown quiz type '$xml->quiztype'");
                 }
         } // end switch
-        return $questions;
+
+        if (count($questions)) {
+            return $questions;
+        } else {
+            return false;
+        }
     }
 
     function process_jcloze(&$xml, &$questions) {