master 7fe22182d3: Fix rare shaping problems with Urdu and Arabic

[Eli Zaretskii]

branch: master
commit 7fe22182d3abcb3124c50f717cc74925800b7720
Author: YAMAMOTO Mitsuharu <mituharu@math.s.chiba-u.ac.jp>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix rare shaping problems with Urdu and Arabic
    
    * src/composite.c (fill_gstring_body): Clear unused slots of the
    gstring.  (Bug#50951)
---
 src/composite.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/composite.c b/src/composite.c
index 22422cca09..249d7587f6 100644
--- a/src/composite.c
+++ b/src/composite.c
@@ -876,7 +876,8 @@ fill_gstring_body (Lisp_Object gstring)
        }
       LGLYPH_SET_ADJUSTMENT (g, Qnil);
     }
-  if (i < LGSTRING_GLYPH_LEN (gstring))
+  len = LGSTRING_GLYPH_LEN (gstring);
+  for (; i < len; i++)
     LGSTRING_SET_GLYPH (gstring, i, Qnil);
 }