use PL_strfree.

mailnews/news/build/nsMsgNewsFactory.cpp

@@ -81,8 +81,8 @@ nsMsgNewsFactory::~nsMsgNewsFactory()
 	NS_ASSERTION(mRefCnt == 0, "non-zero refcnt at destruction");
   
 	NS_IF_RELEASE(mServiceManager);
-	delete[] mClassName;
-	delete[] mProgID;
+	PL_strfree(mClassName);
+	PL_strfree(mProgID);
 }   
 
 nsresult nsMsgNewsFactory::QueryInterface(const nsIID &aIID, void **aResult)