fix dtype (#1676)

selfdrive/ui/paint.cc

@@ -604,10 +604,10 @@ static void ui_draw_driver_view(UIState *s) {
   // draw face box
   if (scene->driver_state.getFaceProb() > 0.4) {
     auto fxy_list = scene->driver_state.getFacePosition();
-    const int face_x = fxy_list[0];
-    const int face_y = fxy_list[1];
-    int fbox_x;
-    int fbox_y = box_y + (face_y + 0.5) * box_h - 0.5 * 0.6 * box_h / 2;;
+    const float face_x = fxy_list[0];
+    const float face_y = fxy_list[1];
+    float fbox_x;
+    float fbox_y = box_y + (face_y + 0.5) * box_h - 0.5 * 0.6 * box_h / 2;;
     if (!scene->is_rhd) {
       fbox_x = valid_frame_x + (1 - (face_x + 0.5)) * (box_h / 2) - 0.5 * 0.6 * box_h / 2;
     } else {