Replace a few instances of malloc() followed by memset(0) with
calloc()

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

Index: libvirt/qemud/iptables.c
===================================================================
--- libvirt.orig/qemud/iptables.c
+++ libvirt/qemud/iptables.c
@@ -270,11 +270,9 @@ iptRulesNew(const char *table,
 {
     iptRules *rules;
 
-    if (!(rules = (iptRules *)malloc(sizeof (iptRules))))
+    if (!(rules = (iptRules *)calloc(1, sizeof (iptRules))))
         return NULL;
 
-    memset (rules, 0, sizeof (iptRules));
-
     if (!(rules->table = strdup(table)))
         goto error;
 
@@ -353,11 +351,9 @@ iptablesAddRemoveChain(iptRules *rules, 
         2 + /*   --table foo     */
         2;  /*   --new-chain bar */
 
-    if (!(argv = (char **)malloc(sizeof(char *) * (n+1))))
+    if (!(argv = (char **)calloc(n + 1, sizeof(char *))))
         goto error;
 
-    memset(argv, 0, sizeof(char *) * (n + 1));
-
     n = 0;
 
     if (!(argv[n++] = strdup(IPTABLES_PATH)))
@@ -413,14 +409,12 @@ iptablesAddRemoveRule(iptRules *rules, i
 
     va_end(args);
 
-    if (!(argv = (char **)malloc(sizeof(char *) * (n + 1))))
+    if (!(argv = (char **)calloc(n + 1, sizeof(char *))))
         goto error;
 
     if (!(rule = (char *)malloc(rulelen)))
         goto error;
 
-    memset(argv, 0, sizeof(char *) * (n + 1));
-
     n = 0;
 
     if (!(argv[n++] = strdup(IPTABLES_PATH)))

--