Fix mingw build warnings in icarus driver.
diff --git a/driver-icarus.c b/driver-icarus.c
index c6c3e2f..6712a36 100644
--- a/driver-icarus.c
+++ b/driver-icarus.c
@@ -724,7 +724,7 @@ static bool icarus_detect_one(struct libusb_device *dev, struct usb_find_devices
const uint32_t golden_nonce_val = 0x000187a2;
unsigned char ob_bin[64], nonce_bin[ICARUS_READ_SIZE];
char *nonce_hex;
- int baud, work_division, fpga_count;
+ int baud, uninitialised_var(work_division), uninitialised_var(fpga_count);
struct cgpu_info *icarus;
int ret, err, amount, tries;
bool ok;