This patch fixes the following invalid comparison of unsigned expression:
novatel/mm-plugin-novatel.c:148:29: error: comparison of unsigned
expression >= 0 is always true [-Werror,-Wtautological-compare]
if (ctx->nwdmat_retries >= 0) {
~~~~~~~~~~~~~~~~~~~ ^ ~
Bug reported on https://code.google.com/p/chromium/issues/detail?id=242150