/*
* Private variables
*/
-static hostlist_t *hostlist_head = NULL;
+static hostlist_t *hostlist_head;
static int ping_af = PING_DEF_AF;
-static char *ping_source = NULL;
+static char *ping_source;
#ifdef HAVE_OPING_1_3
-static char *ping_device = NULL;
+static char *ping_device;
#endif
-static char *ping_data = NULL;
+static char *ping_data;
static int ping_ttl = PING_DEF_TTL;
static double ping_interval = 1.0;
static double ping_timeout = 0.9;