fix for #73853. allow the user to post news message when there isn't a msg window

around. r/sr=bienvenu

mailnews/compose/src/nsMsgSend.cpp

@@ -3162,8 +3162,6 @@ nsMsgComposeAndSend::DeliverFileAsNews()
 	if(NS_FAILED(rv))
 		return rv;
 
-	if (!msgWindow) return NS_ERROR_FAILURE;
-
     rv = nntpService->PostMessage(fileToPost, mCompFields->GetNewsgroups(), mCompFields->GetNewspostUrl(),
                                   uriListener, msgWindow, nsnull);
 	if (NS_FAILED(rv)) return rv;

mailnews/news/src/nsNntpService.cpp

@@ -882,9 +882,9 @@ nsNntpService::GenerateNewsHeaderValsForPosting(const char *newsgroupsList, char
 NS_IMETHODIMP
 nsNntpService::PostMessage(nsIFileSpec *fileToPost, const char *newsgroupsNames, const char *newspostingUrl, nsIUrlListener * aUrlListener, nsIMsgWindow *aMsgWindow, nsIURI **_retval)
 {
-  NS_ENSURE_ARG_POINTER(aMsgWindow);
+  // aMsgWindow might be null
   NS_ENSURE_ARG_POINTER(newsgroupsNames);
-  
+ 
   if (*newsgroupsNames == '\0') return NS_ERROR_INVALID_ARG;
     
   NS_LOCK_INSTANCE();