If the viewport changes the cliprect should be updated

The clip rectangle is defined to be viewport relative, so if the viewport changes we need to update it.

Fixes https://github.com/libsdl-org/SDL/issues/9094

src/render/opengl/SDL_render_gl.c

@@ -1257,6 +1257,7 @@ static int GL_RunCommandQueue(SDL_Renderer *renderer, SDL_RenderCommand *cmd, vo
             if (SDL_memcmp(viewport, &cmd->data.viewport.rect, sizeof(cmd->data.viewport.rect)) != 0) {
                 SDL_copyp(viewport, &cmd->data.viewport.rect);
                 data->drawstate.viewport_dirty = SDL_TRUE;
+                data->drawstate.cliprect_dirty = SDL_TRUE;
             }
             break;
         }