Compilation on Cygwin 2.4.1 resulted in an 'install' that behaved
differently depending on compile-time flags; I traced it to this
warning, where the difference was based on what was left in the
return register:
lib/set-permissions.c: In function 'set_acls_from_mode':
lib/set-permissions.c:273:1: warning: control reaches end of non-void
function [-Wreturn-type]
* lib/set-permissions.c (set_acls) [HAVE_FACL && GETACL]: Don't
fall off end of function. Fixes http://bugs.gnu.org/22949