Fix assertion violations in fontset_find_font

* src/fontset.c (fontset_find_font): Don't assume REPERTORY
must be a fixnum.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/fontset.c b/src/fontset.c
index 2c45c95c3a2..137d2895932 100644
--- a/src/fontset.c
+++ b/src/fontset.c
@@ -575,7 +575,7 @@ fontset_find_font (Lisp_Object fontset, int c, struct face *face,
               break;
             repertory = FONT_DEF_REPERTORY (RFONT_DEF_FONT_DEF (rfont_def));
 
-            if (XFIXNUM (repertory) == charset_id)
+            if (FIXNUMP (repertory) && XFIXNUM_RAW (repertory) == charset_id)
               {
                 charset_matched = i;
                 break;