[master] 37eb85b Don't derefrence NULL pointers

[Poul-Henning Kamp]

commit 37eb85ba98cc8ae6d10f2f2218cfd639fff38a42
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Mon May 15 19:56:47 2017 +0000

    Don't derefrence NULL pointers

diff --git a/lib/libvarnish/vin.c b/lib/libvarnish/vin.c
index 9e47867..fecc554 100644
--- a/lib/libvarnish/vin.c
+++ b/lib/libvarnish/vin.c
@@ -91,7 +91,8 @@ VIN_n_Arg(const char *n_arg, char **name, char **dir)
 	if (dir != NULL) {
 		*dir = strdup(dn);
 		if (*dir == NULL) {
-			free(*name);
+			if (name != NULL)
+				free(*name);
 			return (-1);
 		}
 	}