block/nfs: fix int overflow in nfs_client_open_qdict

block/nfs: fix int overflow in nfs_client_open_qdict

Git-commit: 182454dc63c66ff5a29eddd60cc987b6a1b45e7f

nfs_client_open returns the file size in sectors. This effectively
makes it impossible to open files larger than 1TB.

Fixes: c22a03454544c2a08f1107c5cc8481a5574533d5
Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Lieven <pl@kamp.de>
Message-Id: <20201209121735.16437-1-pl@kamp.de>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Bruce Rogers <brogers@suse.com>