[paint] Fix paint_extents usage

It was broken all this time :(.

The two backends do this slightly differently...

src/OT/Color/COLR/COLR.hh

@@ -2045,7 +2045,6 @@ struct COLR
 				     hb_array (font->coords, font->num_coords));
 
 	bool is_bounded = true;
-	bool pop_clip_first = true;
 	if (clip)
 	{
 	  hb_glyph_extents_t extents;
@@ -2063,6 +2062,8 @@ struct COLR
 	  }
 	  else
 	  {
+	    c.funcs->push_root_transform (c.data, font);
+
 	    auto *extents_funcs = hb_paint_extents_get_funcs ();
 	    hb_paint_extents_context_t extents_data;
 
@@ -2078,24 +2079,16 @@ struct COLR
 					  extents.ymin,
 					  extents.xmax,
 					  extents.ymax);
-
-	    c.funcs->push_root_transform (c.data, font);
-
-	    pop_clip_first = false;
 	  }
 	}
 
 	if (is_bounded)
 	  c.recurse (*paint);
 
-	if (clip && pop_clip_first)
-	  c.funcs->pop_clip (c.data);
+	c.funcs->pop_clip (c.data);
 
         c.funcs->pop_transform (c.data);
 
-	if (clip && !pop_clip_first)
-	  c.funcs->pop_clip (c.data);
-
         return true;
       }
     }

src/hb-ft-colr.hh

@@ -454,12 +454,15 @@ hb_ft_paint_glyph_colr (hb_font_t *font,
     }
     else
     {
+
       auto *extents_funcs = hb_paint_extents_get_funcs ();
       hb_paint_extents_context_t extents_data;
       hb_ft_paint_context_t ce (ft_font, font,
 			        extents_funcs, &extents_data,
 			        palette, foreground);
+      ce.funcs->push_root_transform (ce.data, font);
       ce.recurse (paint);
+      ce.funcs->pop_transform (ce.data);
       hb_extents_t extents = extents_data.get_extents ();
       is_bounded = extents_data.is_bounded ();