Pacify GCC 7 with -Wformat-overflow

* src/w32term.c (x_draw_glyphless_glyph_string_foreground):
Force sprintf to write at most 6 bytes, excluding the
terminating null byte.

diff --git a/src/w32term.c b/src/w32term.c
index ff0d2bf5ddb11f869b0e00f2df596688bc82d4f2..0ae173a876bc9406f942adab6940d4f39f680879 100644 (file)
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -1476,7 +1476,7 @@ x_draw_glyphless_glyph_string_foreground (struct glyph_string *s)
        {
          sprintf ((char *) buf, "%0*X",
                   glyph->u.glyphless.ch < 0x10000 ? 4 : 6,
-                  (unsigned int) glyph->u.glyphless.ch);
+                  (unsigned int) glyph->u.glyphless.ch & 0xffffff);
          str = buf;
        }