STORM-1275 FIX viewer gets caught in infinite loop for decompstub

Fixed setting the initialized flag for the decomposition stub case
(for OS builds) so that the viewer doesn't hang when initializing the stub.

Note that initialized will be set to true even when instance will return NULL.

indra/newview/llmeshrepository.cpp

@@ -3667,6 +3667,9 @@ void LLPhysicsDecomp::run()
 	LLConvexDecomposition* decomp = LLConvexDecomposition::getInstance();
 	if (decomp == NULL)
 	{
+		// stub library. Set init to true so the main thread
+		// doesn't wait for this to finish.
+		mInited = true;
 		return;
 	}