Backport:fix previous change of src/ftfont.c (ftfont_shape_by_flt)

* src/ftfont.c (ftfont_shape_by_flt): Fix previous change.  Access the
second glyph only when there are enough glyphs.

(cherry picked from commit 9835757013569673854b692ccbb58bfb3c3ed1f7)

1 files changed, 6 insertions, 4 deletions

diff --git a/src/ftfont.c b/src/ftfont.c
index bb8af96d7b1..505d508d2e0 100644
--- a/src/ftfont.c
+++ b/src/ftfont.c
@@ -2590,7 +2590,7 @@ ftfont_shape_by_flt (Lisp_Object lgstring, struct font *font,
   flt_font_ft.otf = otf;
   flt_font_ft.matrix = matrix->xx != 0 ? matrix : 0;
 
-  if (1 < len || ! otf)
+  if (1 < len)
     {
       /* A little bit ad hoc.  Perhaps, shaper must get script and
          language information, and select a proper flt for them
@@ -2598,9 +2598,11 @@ ftfont_shape_by_flt (Lisp_Object lgstring, struct font *font,
       int c1 = LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, 1));
       if (CHAR_HAS_CATEGORY (c1, '^'))
         flt = mflt_get (msymbol ("combining"));
-      else if (! otf)
-        flt = mflt_find (LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, 0)),
-                         &flt_font_ft.flt_font);
+    }
+  if (! flt && ! otf)
+    {
+      flt = mflt_find (LGLYPH_CHAR (LGSTRING_GLYPH (lgstring, 0)),
+                       &flt_font_ft.flt_font);
       if (! flt)
         return make_number (0);
     }