device/lms/LMSDevice.cpp: fix compilation warning

The following warning was observed with GCC 4.8.5:

  make[4]: Entering directory `.../osmo-trx/Transceiver52M/device/lms'
    CXX      LMSDevice.lo
  LMSDevice.cpp: In member function 'LMSDevice::writeSamples()':
  LMSDevice.cpp:582:22: warning: 'rc' may be used uninitialized
                        in this function [-Wmaybe-uninitialized]
    samplesWritten += rc;

Let's fix this by zero-initializing 'rc'.

Change-Id: I4b4a061fc12e5fd1db8d1087d8e0c46ff1e23412
1 file changed