[cpal] port to dagger (#1887)

src/hb-ot-color-cpal-table.hh

@@ -146,8 +146,9 @@ struct CPAL
       /* Always return numColors colors per palette even if it has out-of-bounds start index. */
       unsigned int count = hb_min ((unsigned) hb_max ((int) (numColors - start_offset), 0), *color_count);
       *color_count = count;
-      for (unsigned int i = 0; i < count; i++)
-        colors[i] = segment_colors[i]; /* Bound-checked read. */
+      + segment_colors
+      | hb_sink (hb_array (colors, count))
+      ;
     }
     return numColors;
   }