Merge pull request lesstif#55 from say1hello/master

Add is_array check in IssueService::addAttachments

Author: lesstif

src/Issue/IssueService.php

@@ -133,10 +133,13 @@ public function addAttachments($issueIdOrKey, $filePathArray)
 
         $resArr = array();
         foreach ($results as $ret) {
-            array_push($resArr, $this->json_mapper->mapArray(
-               json_decode($ret), new \ArrayObject(), '\JiraRestApi\Issue\Attachment'
-                )
-            );
+            $ret = json_decode($ret);
+            if (is_array($ret)) {
+                array_push($resArr, $this->json_mapper->mapArray(
+                    $ret, new \ArrayObject(), '\JiraRestApi\Issue\Attachment'
+                    )
+                );
+            }
         }
 
         return $resArr;