Fix avoid warning

htdocs/admin/index.php

@@ -100,6 +100,7 @@ print '<br>';
 print '<br>';
 
 // Add hook to add information
+$parameters=array();
 $reshook=$hookmanager->executeHooks('addHomeSetup',$parameters,$object,$action);    // Note that $action and $object may have been modified by some hooks
 print $hookmanager->resPrint;
 if (empty($reshook))

htdocs/core/class/hookmanager.class.php

@@ -184,7 +184,7 @@ class HookManager
                     		}*/
                     	}
 
-                    	if (is_array($actionclassinstance->results))  $this->resArray =array_merge($this->resArray, $actionclassinstance->results);
+                    	if (isset($actionclassinstance->results) && is_array($actionclassinstance->results))  $this->resArray =array_merge($this->resArray, $actionclassinstance->results);
                     	if (! empty($actionclassinstance->resprints)) $this->resPrint.=$actionclassinstance->resprints;
                     }
                     // Generic hooks that return a string or array (printSearchForm, printLeftBlock, formAddObjectLine, formBuilddocOptions, ...)