vps_configure.c: fix logger() arguments format warning

    Fixed the following compilation warnings that were revealed
    after applying commit 812467105eadaccd05e607257b33fd4e7e84d8c4

  CC     vps_configure.lo
vps_configure.c: In function ‘vps_quota_configure’:
vps_configure.c:231: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘long unsigned int’
1 file changed