Fixing bug 263388. Patch by trev@gtchat.de. Make opening filepickers possible from frames that are not displayed, i.e. have no widget. r=jst@mozilla.org, sr=bzbarsky@mit.edu

widget/src/xpwidgets/nsBaseFilePicker.cpp

@@ -92,8 +92,6 @@ nsIWidget *nsBaseFilePicker::DOMWindowToWidget(nsIDOMWindow *dw)
 
         nsCOMPtr<nsIDocShellTreeItem> parent;
         docShellAsItem->GetSameTypeParent(getter_AddRefs(parent));
-        if (!parent)
-          return nsnull;
 
         sgo = do_GetInterface(parent);
         if (!sgo)