Avoid build failure: isdigit() expects an integer argument.

1 files changed, 1 insertions, 1 deletions

diff --git a/token.c b/token.c
index 5173a4e..aaa51d1 100644
--- a/token.c
+++ b/token.c
@@ -213,7 +213,7 @@ ppnum:		for (;;) {
 num:			if (YYSTATE == IFR)
 				cvtdig(scale);
 			PRTOUT(NUMBER);
-		} else if (yytext[0] == '0' && isdigit(yytext[1])) {
+		} else if (yytext[0] == '0' && isdigit((int)yytext[1])) {
 			scale = 8; goto num;
 		} else if (haspmd) {
 			PRTOUT(FPOINT);