Added extra assert

git-svn-id: svn://10.0.0.236/trunk@13491 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/webshell/embed/ActiveX/MozillaBrowser.cpp

@@ -175,6 +175,7 @@ HRESULT CMozillaBrowser::CreateWebShell()
 					r.x, r.y,
 					r.width, r.height,
 					nsScrollPreference_kAuto, aAllowPlugins);
+	NG_ASSERT(rv == NS_OK);
 
 	// Create the container object
 	m_pWebShellContainer = new CWebShellContainer(this);