Build type information on first use (load-time), instead of using a hardcoded list

--HG--
branch : dynamiccore2

src/modules/graphics/opengl/Mesh.cpp

@@ -58,6 +58,8 @@ static std::vector<Mesh::AttribFormat> getDefaultVertexFormat()
 	return vertexformat;
 }
 
+love::Type Mesh::type(&Drawable::type);
+
 Mesh::Mesh(const std::vector<AttribFormat> &vertexformat, const void *data, size_t datasize, DrawMode drawmode, Usage usage)
 	: vertexFormat(vertexformat)
 	, vbo(nullptr)