Mask color font so emojis don't make st crash

From st's README:

> Xft makes st crash when rendering color emojis

I documented the modification to x.c there:

https://yctct.com/st-emoji-crash

1 files changed, 1 insertions, 1 deletions

diff --git a/x.c b/x.c
index d73152b..ad8bd6d 100644
--- a/x.c
+++ b/x.c
@@ -1331,7 +1331,7 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
 			FcCharSetAddChar(fccharset, rune);
 			FcPatternAddCharSet(fcpattern, FC_CHARSET,
 					fccharset);
-			FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
+			FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
 
 			FcConfigSubstitute(0, fcpattern,
 					FcMatchPattern);