* xdisp.c (produce_glyphless_glyph): Make a pointer "const"

since it might point to immutable storage.

src/ChangeLog

@@ -9,6 +9,8 @@
 	(mouse_face_from_buffer_pos, note_mouse_highlight, expose_frame):
 	Rename or move local decls.
 	* xdisp.c (BUILD_GLYPHLESS_GLYPH_STRING): Omit unused local var.
+	(produce_glyphless_glyph): Make a pointer "const"
+	since it might point to immutable storage.
 2011-03-06  Michael Shields  <shields@msrl.com>  (tiny change)

src/xdisp.c

@@ -22267,7 +22267,8 @@ produce_glyphless_glyph (struct it *it, int for_no_font, Lisp_Object acronym)
     }
   else
     {
-      char buf[7], *str;
+      char buf[7];
+      const char *str;
       unsigned int code[6];
       int upper_len;
       int ascent, descent;