From: Magnus Jacobsson <magnus.jacobsson@berotec.se>
Date: Sun, 4 Oct 2020 18:51:58 +0000 (+0200)
Subject: Explicitly specify -? as an option in gvcolor
X-Git-Tag: 2.46.0~20^2^2~47^2~11
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2fcd3606d265c4a112e468f387a47a7483933491;p=graphviz

Explicitly specify -? as an option in gvcolor
---

diff --git a/cmd/tools/gvcolor.c b/cmd/tools/gvcolor.c
index d1320a2aa..e73bf9cad 100644
--- a/cmd/tools/gvcolor.c
+++ b/cmd/tools/gvcolor.c
@@ -88,10 +88,10 @@ static void init(int argc, char *argv[])
     int c;
 
     opterr = 0;
-    while ((c = getopt(argc, argv, ":")) != -1) {
+    while ((c = getopt(argc, argv, ":?")) != -1) {
 	switch (c) {
 	case '?':
-	    if (optopt == '?')
+	    if (optopt == '\0')
 		usage(0);
 	    else {
 		fprintf(stderr, "gvcolor: option -%c unrecognized\n",