From a47fbb16412bbec1507d00be3cade04cce2536fe Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Mon, 31 Oct 2005 16:47:30 +0000
Subject: ctype sign fixes (Tom Miller)

---
 src/cmd/graph/graph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/cmd/graph')

diff --git a/src/cmd/graph/graph.c b/src/cmd/graph/graph.c
index 01c8bc66..3e740cb0 100644
--- a/src/cmd/graph/graph.c
+++ b/src/cmd/graph/graph.c
@@ -258,7 +258,7 @@ numb(float *np, int *argcp, char ***argvp){
 		return(0);
 	while((c=(*argvp)[1][0]) == '+')
 		(*argvp)[1]++;
-	if(!(isdigit(c) || c=='-'&&(*argvp)[1][1]<'A' || c=='.'))
+	if(!(isdigit((uchar)c) || c=='-'&&(*argvp)[1][1]<'A' || c=='.'))
 		return(0);
 	*np = atof((*argvp)[1]);
 	(*argcp)--;
-- 
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