fix signedness warnings in blaze_util_posix.cc    if (result != count) {        ~~~~~~~^~~~~~~~
fix signedness warnings in blaze_util_posix.cc
   if (result != count) {
       ~~~~~~~^~~~~~~~

Of course, problems arising from this are only theoretical.

Change-Id: Id045a97623026e005d40940eb4a7d30d73f4ce32
PiperOrigin-RevId: 157561218

werkt/bazel,davidzchen/bazel,ulfjack/bazel,werkt/bazel,perezd/bazel,cushon/bazel,damienmg/bazel,perezd/bazel,damienmg/bazel,cushon/bazel,cushon/bazel,dslomov/bazel,snnn/bazel,twitter-forks/bazel,ulfjack/bazel,davidzchen/bazel,akira-baruah/bazel,cushon/bazel,katre/bazel,meteorcloudy/bazel,variac/bazel,safarmer/bazel,ulfjack/bazel,dslomov/bazel,davidzchen/bazel,akira-baruah/bazel,dropbox/bazel,aehlig/bazel,meteorcloudy/bazel,aehlig/bazel,snnn/bazel,davidzchen/bazel,perezd/bazel,aehlig/bazel,katre/bazel,ButterflyNetwork/bazel,variac/bazel,bazelbuild/bazel,davidzchen/bazel,dslomov/bazel-windows,twitter-forks/bazel,spxtr/bazel,snnn/bazel,katre/bazel,meteorcloudy/bazel,safarmer/bazel,dslomov/bazel,damienmg/bazel,dslomov/bazel-windows,damienmg/bazel,ButterflyNetwork/bazel,dslomov/bazel-windows,dslomov/bazel,cushon/bazel,dslomov/bazel,ulfjack/bazel,spxtr/bazel,twitter-forks/bazel,safarmer/bazel,twitter-forks/bazel,meteorcloudy/bazel,bazelbuild/bazel,akira-baruah/bazel,aehlig/bazel,katre/bazel,dslomov/bazel,dropbox/bazel,dropbox/bazel,werkt/bazel,davidzchen/bazel,dslomov/bazel,werkt/bazel,spxtr/bazel,akira-baruah/bazel,aehlig/bazel,dslomov/bazel-windows,variac/bazel,variac/bazel,snnn/bazel,werkt/bazel,twitter-forks/bazel,damienmg/bazel,ulfjack/bazel,bazelbuild/bazel,spxtr/bazel,ButterflyNetwork/bazel,variac/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,safarmer/bazel,katre/bazel,dropbox/bazel,perezd/bazel,ulfjack/bazel,ButterflyNetwork/bazel,dropbox/bazel,davidzchen/bazel,dropbox/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,spxtr/bazel,katre/bazel,meteorcloudy/bazel,perezd/bazel,meteorcloudy/bazel,dslomov/bazel-windows,snnn/bazel,bazelbuild/bazel,werkt/bazel,aehlig/bazel,meteorcloudy/bazel,variac/bazel,twitter-forks/bazel,perezd/bazel,aehlig/bazel,damienmg/bazel,dslomov/bazel-windows,akira-baruah/bazel,safarmer/bazel,ulfjack/bazel,perezd/bazel,damienmg/bazel,akira-baruah/bazel,cushon/bazel,snnn/bazel,spxtr/bazel,safarmer/bazel,bazelbuild/bazel,spxtr/bazel,snnn/bazel,variac/bazel