trivial: fix a mac build error.

indra/llmessage/llcurl.cpp

@@ -915,7 +915,7 @@ void LLCurlThread::CurlRequest::finishRequest(bool completed)
 	}
 	else
 	{
-		mMulti->cleanup() ; //being idle too long, remove the request.
+		mCurlThread->cleanupMulti(mMulti) ; //being idle too long, remove the request.
 	}
 
 	mMulti = NULL ;
@@ -976,6 +976,13 @@ void LLCurlThread::deleteMulti(LLCurl::Multi* multi)
 {
 	delete multi ;
 }
+
+//private
+void LLCurlThread::cleanupMulti(LLCurl::Multi* multi) 
+{
+	multi->cleanup() ;
+}
+
 //------------------------------------------------------------
 
 //static

indra/llmessage/llcurl.h

@@ -370,6 +370,7 @@ class LLCurlThread : public LLQueuedThread
 private:
 	bool doMultiPerform(LLCurl::Multi* multi) ;
 	void deleteMulti(LLCurl::Multi* multi) ;
+	void cleanupMulti(LLCurl::Multi* multi) ;
 } ;
 
 namespace boost