X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fopt%2Fusage.c;fp=ccan%2Fopt%2Fusage.c;h=8ee4ebd03ad5083e2f8a36649319190edb14e7b5;hp=12f44a48752e0e0d4e0d722c74b7513561334733;hb=fbac6a54735b5d153be4675d555e73713186cf69;hpb=88d2fca81ce9df2ed11cbcf34cf35d078313c4cc

diff --git a/ccan/opt/usage.c b/ccan/opt/usage.c
index 12f44a48..8ee4ebd0 100644
--- a/ccan/opt/usage.c
+++ b/ccan/opt/usage.c
@@ -72,7 +72,8 @@ static size_t consume_words(const char *words, size_t maxlen, size_t *prefix,
 		}
 	}
 
-	*start = (words[oldlen - 1] == '\n');
+	if (oldlen != 0)
+		*start = (words[oldlen - 1] == '\n');
 	return oldlen;
 }