don't strcasecmp on null string

src/mod/endpoints/mod_sofia/sofia_reg.c

@@ -1124,8 +1124,8 @@ uint8_t sofia_reg_handle_register(nua_t *nua, sofia_profile_t *profile, nua_hand
 				}
 			}
 
-			if ((v_contact_str = switch_event_get_header(*v_event, "sip-force-contact")) || auto_connectile) {
-				if ((!strcasecmp(v_contact_str, "NDLB-connectile-dysfunction-2.0")) || auto_connectile) {
+			if (auto_connectile || (v_contact_str = switch_event_get_header(*v_event, "sip-force-contact"))) {
+				if (auto_connectile || (!strcasecmp(v_contact_str, "NDLB-connectile-dysfunction-2.0"))) {
 					char *path_encoded;
 					size_t path_encoded_len;
 					char my_contact_str[1024];