[master] aebfbe944 It is OK to call realloc(3) with a NULL pointer

[Poul-Henning Kamp]

commit aebfbe9448c2a57edb21ec469abce2140beec150
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Thu Apr 18 08:39:40 2019 +0000

    It is OK to call realloc(3) with a NULL pointer

diff --git a/lib/libvmod_directors/shard_cfg.c b/lib/libvmod_directors/shard_cfg.c
index 70d709c43..62d2e74f1 100644
--- a/lib/libvmod_directors/shard_cfg.c
+++ b/lib/libvmod_directors/shard_cfg.c
@@ -382,12 +382,8 @@ shardcfg_backend_expand(const struct backend_reconfig *re)
 	else
 		re->shardd->l_backend <<= 1;
 
-	if (re->shardd->backend)
-		re->shardd->backend = realloc(re->shardd->backend,
-		    re->shardd->l_backend * sizeof *re->shardd->backend);
-	else
-		re->shardd->backend = malloc(
-		    re->shardd->l_backend * sizeof *re->shardd->backend);
+	re->shardd->backend = realloc(re->shardd->backend,
+	    re->shardd->l_backend * sizeof *re->shardd->backend);
 
 	AN(re->shardd->backend);
 }