simtrace2: Set transp->udp_fd to -1 to indicate USB transport
Change-Id: Ie97f1d449509777661f7fcc2bd0c799711861184
diff --git a/src/client/user_simtrace2.c b/src/client/user_simtrace2.c
index ea89a82..39e6b32 100644
--- a/src/client/user_simtrace2.c
+++ b/src/client/user_simtrace2.c
@@ -411,6 +411,7 @@
ifm->addr = cfg->usb.addr;
if (cfg->usb.path)
osmo_strlcpy(ifm->path, cfg->usb.path, sizeof(ifm->path));
+ transp->udp_fd = -1;
transp->usb_devh = osmo_libusb_open_claim_interface(NULL, NULL, ifm);
if (!transp->usb_devh) {
fprintf(stderr, "can't open USB device\n");