Fix pos-visible-in-window-p for zero-column composed character.

 src/xdisp.c (x_produce_glyphs): Set it->nglyphs to 1.  Fixes pixel
 coordinates reported by pos-visible-in-window-p for a composed
 character in column zero.

2 files changed, 8 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index a1a826d625f..ffb8dd76366 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2011-08-23  Eli Zaretskii  <eliz@gnu.org>
+
+        * xdisp.c (x_produce_glyphs): Set it->nglyphs to 1.  Fixes pixel
+        coordinates reported by pos-visible-in-window-p for a composed
+        character in column zero.
+
 2011-08-23  Stefan Monnier  <monnier@iro.umontreal.ca>
 
         * cmds.c (Fself_insert_command): Mention post-self-insert-hook.
diff --git a/src/xdisp.c b/src/xdisp.c
index 1878327480f..9b2b0da4317 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -24064,6 +24064,8 @@ x_produce_glyphs (struct it *it)
       Lisp_Object gstring;
       struct font_metrics metrics;
 
+      it->nglyphs = 1;
+
       gstring = composition_gstring_from_id (it->cmp_it.id);
       it->pixel_width
         = composition_gstring_width (gstring, it->cmp_it.from, it->cmp_it.to,