fixed old MSVC support

oxygine/src/res/CreateResourceContext.cpp

@@ -6,7 +6,11 @@
 
 namespace oxygine
 {
+#ifdef _MSC_VER
+    __declspec(thread) bool _isMainThread = false;
+#else
     thread_local bool _isMainThread = false;
+#endif
 
 
     void LoadResourcesContext::init()

oxygine/src/res/Resource.cpp

@@ -17,8 +17,6 @@ namespace oxygine
 
     void Resource::load(LoadResourcesContext* context /* = 0 */)
     {
-        LoadResourcesContext* getContext();
-
         if (!context)
             context = LoadResourcesContext::get();