message: Update usb_linux_utils.cpp
  usb_linux_utils.cpp fix int ret initialization on line 134, this cause error on Yocto GCC 7.3.0
diff: @@ -131,7 +131,7 @@ int UsbLinuxUtils::uvcExUnitReadOnePacket(int fd, uint8_t selector,
  int UsbLinuxUtils::uvcExUnitReadBuffer(int fd, uint8_t selector,
  uint32_t address, uint8_t *data,
  uint32_t bufferLength) {
  - int ret;
  + int ret = 0;
  uint32_t readBytes = 0;
  uint32_t readLength = 0;
  uint32_t crtAddress = address;
  