Merge pull request #36 from marc-mabe/hotfix/AbstractAdapter_internal…

…DecrementItems

fixed AbstractAdapter::internalDecrementItems

src/Storage/Adapter/AbstractAdapter.php

@@ -1466,7 +1466,7 @@ protected function internalDecrementItems(array & $normalizedKeyValuePairs)
     {
         $result = [];
         foreach ($normalizedKeyValuePairs as $normalizedKey => $value) {
-            $newValue = $this->decrementItem($normalizedKey, $value);
+            $newValue = $this->internalDecrementItem($normalizedKey, $value);
             if ($newValue !== false) {
                 $result[$normalizedKey] = $newValue;
             }