POSIX: warn if %prec's token was not defined.

[bison.git] / src / scan-gram.l

diff --git a/src/scan-gram.l b/src/scan-gram.l
index f0f8c2796b084d19dbde8481db4d239f3bd994e4..f199ec38ef337fa5e72cf98bba483f21e62cbc06 100644 (file)
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -561,7 +561,7 @@ splice       (\\[ \f\t\v]*\n)*
   \\(.|\n)     {
     char const *p = yytext + 1;
     /* Quote only if escaping won't make the character visible.  */
-    if (isspace (*p) && isprint (*p))
+    if (isspace ((unsigned char) *p) && isprint ((unsigned char) *p))
       p = quote (p);
     else
       p = quotearg_style_mem (escape_quoting_style, p, 1);