Fix for warning Trying to access array offset on value of type bool (#188)

Fix for warning Trying to access array offset on value of type bool

---------

Co-authored-by: Michael Mussulis <michael@xtreme-vision.net>

Author: xtremevision

Client.php

@@ -1152,10 +1152,12 @@ public function __call($name, $args)
 
                         if ($this->isMulti) {
                             $execResponse = array_pop($response);
-                            foreach ($queuedResponses as $key => $command) {
-                                list($name, $arguments) = $command;
-                                $response[] = $this->decode_reply($name, $execResponse[$key], $arguments);
-                            }
+                            if(!empty($execResponse)) {
+                                foreach ($queuedResponses as $key => $command) {
+                                    list($name, $arguments) = $command;
+                                    $response[] = $this->decode_reply($name, $execResponse[$key], $arguments);
+                                }
+                    	    }
                         }
                     } catch (CredisException $e) {
                         // the connection on redis's side is likely in a bad state, force it closed to abort the pipeline/transaction