Add Data:getFFIPointer. Similar to Data:getPointer but returns a cdata pointer directly (or nil if the FFI isn't available).

It should be preferred instead of Data:getPointer because the latter uses lightuserdata which can't store more all possible memory addresses on some new arm64 architectures, when LuaJIT is used.

src/modules/font/wrap_GlyphData.cpp

@@ -141,7 +141,9 @@ const luaL_Reg w_GlyphData_functions[] =
 
 extern "C" int luaopen_glyphdata(lua_State *L)
 {
-	return luax_register_type(L, &GlyphData::type, data::w_Data_functions, w_GlyphData_functions, nullptr);
+	int ret = luax_register_type(L, &GlyphData::type, data::w_Data_functions, w_GlyphData_functions, nullptr);
+	love::data::luax_rundatawrapper(L, GlyphData::type);
+	return ret;
 }
 
 } // font