Refactor xmake.lua and make some warnings as errors

include/Nazara/Core/VirtualDirectory.inl

@@ -215,7 +215,8 @@ namespace Nz
 					}
 					else
 					{
-						constexpr std::size_t blockSize = 4 * 1024;
+						// File size isn't know, read it block by block until the end of stream
+						constexpr std::size_t blockSize = 4u * 1024;
 
 						while (!stream.EndOfStream())
 						{

include/Nazara/Graphics/Tilemap.hpp

@@ -82,11 +82,11 @@ namespace Nz
 			};
 
 			mutable std::vector<VertexStruct_XYZ_Color_UV> m_vertices;
-			std::vector<Tile> m_tiles;
 			std::vector<Layer> m_layers;
-			Vector2ui m_mapSize;
+			std::vector<Tile> m_tiles;
 			Vector2f m_origin;
 			Vector2f m_tileSize;
+			Vector2ui m_mapSize;
 			bool m_isometricModeEnabled;
 			mutable bool m_shouldRebuildVertices;
 	};