Fix show-trailing-whitespace in R2L text

* src/xdisp.c (highlight_trailing_whitespace): Allow for
stretch glyphs at the left edge of R2L lines, when skipping
glyphs inserted by the display engine.  This unbreaks
show-trailing-whitespace in R2L lines.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index 6d30afda6d8..5ae8fc1cf6b 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -20578,7 +20578,7 @@ highlight_trailing_whitespace (struct it *it)
       else
         {
           while (glyph <= start
-                 && glyph->type == CHAR_GLYPH
+                 && (glyph->type == CHAR_GLYPH || glyph->type == STRETCH_GLYPH)
                  && NILP (glyph->object))
             ++glyph;
         }