Fixes attempting to curl when there is nothing to curl. (#80)

Author: pingers

src/PrestissimoFileFetcher.php

@@ -55,6 +55,9 @@ protected function fetchWithPrestissimo($version, $destination, $override) {
 
     $successCnt = $failureCnt = 0;
     $totalCnt = count($requests);
+    if ($totalCnt == 0) {
+      return;
+    }    
 
     $multi = new CurlMulti();
     $multi->setRequests($requests);