fix c++ designated init error

Author: floooh

examples/common/ui.cc

@@ -151,11 +151,11 @@ bool ui_input(const sapp_event* event) {
 ui_texture_t ui_create_texture(int w, int h) {
     return simgui_imtextureid_with_sampler(
         sg_make_image({
-            .width = w,
-            .height = h,
             .usage = {
                 .stream_update = true,
             },
+            .width = w,
+            .height = h,
             .pixel_format = SG_PIXELFORMAT_RGBA8,
         }),
         state.nearest_sampler);