Fixed usage of uninitialised variable (bug 184410)

Index: hostap-utils-0.4.7/hostap_crypt_conf.c
===================================================================
--- hostap-utils-0.4.7.orig/hostap_crypt_conf.c
+++ hostap-utils-0.4.7/hostap_crypt_conf.c
@@ -207,13 +207,13 @@ static int show_key(const char *dev, cha
 	struct prism2_hostapd_param *param;
 	int idx, i, max_key_len;
 
-	max_key_len = sizeof(buf) -
-		(int) ((char *) param->u.crypt.key - (char *) param);
-
 	memset(buf, 0, sizeof(buf));
 	param = (struct prism2_hostapd_param *) buf;
 	param->cmd = PRISM2_GET_ENCRYPTION;
 
+	max_key_len = sizeof(buf) -
+		(int) ((char *) param->u.crypt.key - (char *) param);
+
 	if (macstr2addr(addr, param->sta_addr))
 		return -1;
 	param->u.crypt.idx = 0xff;