From 4b3e5a6bd64335ad207167fa8fd39a098c50c1db Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Sat, 6 Jul 2019 15:33:46 -0700
Subject: Handle argv = { NULL } in ARGBEGIN

---
 arg.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arg.h b/arg.h
index 6a3f112..9756516 100644
--- a/arg.h
+++ b/arg.h
@@ -1,6 +1,7 @@
 #define ARGBEGIN \
 	for (;;) { \
-		++argv, --argc; \
+		if (argc > 0) \
+			++argv, --argc; \
 		if (argc == 0 || (*argv)[0] != '-') \
 			break; \
 		if ((*argv)[1] == '-' && !(*argv)[2]) { \
-- 
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