Fix for mac/linux build

indra/llaudio/llaudiodecodemgr.cpp

@@ -690,7 +690,7 @@ BOOL LLAudioDecodeMgr::addDecodeRequest(const LLUUID &uuid)
 	return FALSE;
 }
 
-#if LL_DARWIN || LL_LINUX
+#if LL_DARWIN
 // HACK: to fool the compiler into not emitting unused warnings.
 namespace {
 	const ov_callbacks callback_array[4] = {OV_CALLBACKS_DEFAULT, OV_CALLBACKS_NOCLOSE, OV_CALLBACKS_STREAMONLY, 

indra/llcommon/llthread.h

@@ -234,7 +234,7 @@ protected:
 public:
 	LLThreadSafeRefCount();
 	LLThreadSafeRefCount(const LLThreadSafeRefCount&);
-	LLThreadSafeRefCount&operator=(const LLThreadSafeRefCount& ref) 
+	LLThreadSafeRefCount& operator=(const LLThreadSafeRefCount& ref) 
 	{
 		if (sMutex)
 		{
@@ -245,6 +245,7 @@ public:
 		{
 			sMutex->unlock();
 		}
+		return *this;
 	}