Bug #39736 --> charset over ride has no effect on quoting. Fix is to use the charset

we just passed in.
r=nhotta

mailnews/compose/src/nsMsgQuote.cpp

@@ -144,7 +144,8 @@ NS_IMETHODIMP nsMsgQuote::GetStreamListener(nsIStreamListener ** aStreamListener
 }
 
 nsresult
-nsMsgQuote::QuoteMessage(const PRUnichar *msgURI, PRBool quoteHeaders, nsIStreamListener * aQuoteMsgStreamListener)
+nsMsgQuote::QuoteMessage(const PRUnichar *msgURI, PRBool quoteHeaders, nsIStreamListener * aQuoteMsgStreamListener,
+                         const PRUnichar * aMsgCharSet)
 {
   nsresult  rv;
 
@@ -176,6 +177,14 @@ nsMsgQuote::QuoteMessage(const PRUnichar *msgURI, PRBool quoteHeaders, nsIStream
 
   aURL->SetSpec((const char *) modifiedUrlSpec);
 
+  // if we were given a non empty charset, then use it
+  if (aMsgCharSet && *aMsgCharSet)
+  {
+    nsCOMPtr<nsIMsgI18NUrl> i18nUrl (do_QueryInterface(aURL));
+    if (i18nUrl)
+      i18nUrl->SetCharsetOverRide(aMsgCharSet);
+  }
+
   rv = nsComponentManager::CreateInstance(kMsgQuoteListenerCID, nsnull, NS_GET_IID(nsIMsgQuoteListener), getter_AddRefs(mQuoteListener));
   if (NS_FAILED(rv)) return rv;
   mQuoteListener->SetMsgQuote(this);