Patch for emacs macfont.m enabling multicolor font support.

patch-multicolor-font.diff

diff --git a/src/macfont.m b/src/macfont.m
index 0445628..c9082a5 100644
--- a/src/macfont.m
+++ b/src/macfont.m
@@ -2373,9 +2373,9 @@ So we use CTFontDescriptorCreateMatchingFontDescriptor (no
                   != (spacing >= FONT_SPACING_MONO)))
             continue;
 
-          /* Don't use a color bitmap font until it is supported on
-	     free platforms.  */
-          if (sym_traits & kCTFontTraitColorGlyphs)
+          /* Don't use a color bitmap font unless its family is
+             explicitly specified.  */
+          if ((sym_traits & kCTFontTraitColorGlyphs) && NILP (family))
             continue;
 
           if (j > 0