Fix memory leak.

Newer versions of iptables does not call iptc_free(), after
iptc_commit().  This is done to support several commits,
but we choose not to support this feature.  Thus, we need
to free memory here (used by the iptables ruleset, actually
the cached libiptc blob version), to avoid mem leak.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>

libiptc.xs

@@ -96,9 +96,13 @@ commit(self)
 	    SET_ERRSTR("%s", iptc_strerror(errno));
 	    SvIOK_on(ERROR_SV);
 	}
-	// FIXME: Think its allowed to do several commits in newer
-	// versions of iptables, thus we should not set self=NULL
-//	self = NULL;
+        /* Newer versions of iptables does not call iptc_free(), after
+           iptc_commit().  This is done to support several commits,
+           but we choose not to support this feature.  Thus, we need
+           to free memory here (used by the iptables ruleset, actually
+           the cached libiptc blob version).
+        */
+	iptc_free(self);
 	# TODO: UnLock /var/lock/iptables_tablename
     }
   OUTPUT: