b=349837, cairo crash in _cairo_clip_init_deep_copy; upstream patch, r=vlad

gfx/cairo/cairo/src/cairo-clip.c

@@ -563,7 +563,7 @@ _cairo_clip_init_deep_copy (cairo_clip_t    *clip,
         }
 
         if (other->surface) {
-            _cairo_surface_clone_similar (target, clip->surface, &clip->surface);
+            _cairo_surface_clone_similar (target, other->surface, &clip->surface);
             clip->surface_rect = other->surface_rect;
         }