build: fix virpidfile on mingw
build: fix virpidfile on mingw

Regression introduced in commit b7e5ca4.

Mingw lacks kill(), but we were only using it for a sanity check;
so we can go with one less check.

Also, on OOM error, this function should outright fail rather than
claim that the pid file was successfully read.

* src/util/virpidfile.c (virPidFileReadPathIfAlive): Skip kill
call where unsupported, and report error on OOM.

siboulet/libvirt-openvz,rlaager/libvirt,fabianfreyer/libvirt,trainstack/libvirt,zippy2/libvirt,soulxu/libvirt-xuhj,rmarwaha/libvirt,novel/fbsd-libvirt,nertpinx/libvirt,danwent/libvirt-ovs,iam-TJ/libvirt,usc-isi/libvirt,iam-TJ/libvirt,zhlcindy/libvirt-1.1.4-maintain,fabianfreyer/libvirt,wiedi/libvirt,foomango/libvirt,novel/fbsd-libvirt,olafhering/libvirt,zhlcindy/libvirt-1.1.4-maintain,usc-isi/libvirt,agx/libvirt,rmarwaha/libvirt,dumbbell/libvirt,trainstack/libvirt,foomango/libvirt,jeckersb/libvirt,bjzhang/libvirt,zhlcindy/libvirt-1.1.4-maintain,VenkatDatta/libvirt,jardasgit/libvirt,leilihh/libvirt,bjzhang/libvirt,jeckersb/libvirt,cbosdo/libvirt,kantai/libvirt-vfork,leilihh/libvirt,emaste/libvirt,jeckersb/libvirt,leilihh/libvirt,bjzhang/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,leilihh/libvirt,kantai/libvirt-vfork,jfehlig/libvirt,wiedi/libvirt,taget/libvirt,olafhering/libvirt,novel/fbsd-libvirt,crobinso/libvirt,leilihh/libvirt,agx/libvirt,crobinso/libvirt,jardasgit/libvirt,libvirt/libvirt,eskultety/libvirt,nertpinx/libvirt,taget/libvirt,siboulet/libvirt-openvz,emaste/libvirt,kantai/libvirt-vfork,eskultety/libvirt,iam-TJ/libvirt,novel/fbsd-libvirt,jeckersb/libvirt,zippy2/libvirt,iam-TJ/libvirt,rmarwaha/libvirt1,VenkatDatta/libvirt,emaste/libvirt,novel/fbsd-libvirt,dumbbell/libvirt,rlaager/libvirt,jeckersb/libvirt,jfehlig/libvirt,datto/libvirt,andreabolognani/libvirt,danwent/libvirt-ovs,eskultety/libvirt,datto/libvirt,rmarwaha/libvirt,novel/fbsd-libvirt,foomango/libvirt,fabianfreyer/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt1,shugaoye/libvirt,trainstack/libvirt,danwent/libvirt-ovs,shugaoye/libvirt,wiedi/libvirt,zhlcindy/libvirt-1.1.4-maintain,warewolf/libvirt,warewolf/libvirt,andreabolognani/libvirt,wiedi/libvirt,trainstack/libvirt,rlaager/libvirt,jfehlig/libvirt,bjzhang/libvirt,rmarwaha/libvirt,datto/libvirt,elmarco/libvirt,soulxu/libvirt-xuhj,siboulet/libvirt-openvz,eskultety/libvirt,crobinso/libvirt,rmarwaha/libvirt1,warewolf/libvirt,rlaager/libvirt,shugaoye/libvirt,taget/libvirt,VenkatDatta/libvirt,jeckersb/libvirt,agx/libvirt,warewolf/libvirt,rmarwaha/libvirt,zippy2/libvirt,zippy2/libvirt,wiedi/libvirt,fabianfreyer/libvirt,VenkatDatta/libvirt,rmarwaha/libvirt,elmarco/libvirt,andreabolognani/libvirt,jfehlig/libvirt,agx/libvirt,usc-isi/libvirt,leilihh/libvirt,kantai/libvirt-vfork,warewolf/libvirt,soulxu/libvirt-xuhj,rmarwaha/libvirt1,olafhering/libvirt,soulxu/libvirt-xuhj,datto/libvirt,dumbbell/libvirt,elmarco/libvirt,rmarwaha/libvirt1,nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,libvirt/libvirt,siboulet/libvirt-openvz,rmarwaha/libvirt1,trainstack/libvirt,trainstack/libvirt,iam-TJ/libvirt,wiedi/libvirt,jardasgit/libvirt,rlaager/libvirt,crobinso/libvirt,jardasgit/libvirt,jeckersb/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,novel/fbsd-libvirt,trainstack/libvirt,cbosdo/libvirt,jardasgit/libvirt,emaste/libvirt,danwent/libvirt-ovs,warewolf/libvirt,elmarco/libvirt,elmarco/libvirt,wiedi/libvirt,emaste/libvirt,soulxu/libvirt-xuhj,emaste/libvirt,libvirt/libvirt,VenkatDatta/libvirt,cbosdo/libvirt,cbosdo/libvirt,usc-isi/libvirt,libvirt/libvirt,usc-isi/libvirt,shugaoye/libvirt,andreabolognani/libvirt,eskultety/libvirt,warewolf/libvirt,kantai/libvirt-vfork,agx/libvirt,foomango/libvirt,taget/libvirt,nertpinx/libvirt,foomango/libvirt,siboulet/libvirt-openvz,nertpinx/libvirt,dumbbell/libvirt,andreabolognani/libvirt,shugaoye/libvirt,datto/libvirt,bjzhang/libvirt,olafhering/libvirt,taget/libvirt,novel/fbsd-libvirt,emaste/libvirt,iam-TJ/libvirt,dumbbell/libvirt,dumbbell/libvirt