renamed to Size2u instead of Size2ui

inc/hgl/type/Size2.h

@@ -104,7 +104,7 @@ namespace hgl
     };//template<typename T> struct Size2
 
     using Size2i    =Size2<int>;
-    using Size2ui   =Size2<uint>;
+    using Size2u    =Size2<uint>;
     using Size2s    =Size2<int16>;
     using Size2us   =Size2<uint16>;
     using Size2f    =Size2<float>;