Check return value of fwrite when copying files

Check that writing to destination file actually occurs in
_alpm_copyfile.  Required adding a new error (PM_ERR_WRITE)
as none of the others appeared appropriate.

Prevents compiler warning when using -D_FORTIFY_SOURCE=2.

Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

0 files changed, 0 insertions, 0 deletions