Fixing NULL to char assignment

diff --git a/src/usb.c b/src/usb.c
index e8d8ec39ddd0ee1946a701fa58c410f517f5f775..9c04ec8608e2562e0f0fb41bff488b141818ba78 100644 (file)
--- a/src/usb.c
+++ b/src/usb.c
@@ -946,7 +946,7 @@ static size_t stlink_probe_usb_devs(libusb_device **devs, stlink_t **sldevs[]) {
 
         ret = libusb_get_string_descriptor_ascii(handle, desc.iSerialNumber, (unsigned char *)&serial, sizeof(serial));
         if (ret < 0)
-          *serial = NULL;
+          *serial = 0;
 
         libusb_close(handle);