better support for gles2

src/map/map.cpp

@@ -57,6 +57,7 @@ void Map::resize(uint32_t width, uint32_t height, uint32_t fb_width, uint32_t fb
     transform.fb_width = fb_width;
     transform.fb_height = fb_height;
     transform.pixelRatio = pixel_ratio;
+    painter.resize(fb_width, fb_height);
     update();
 }