block: rnbd-clt: Fix signedness bug in init_dev()

block: rnbd-clt: Fix signedness bug in init_dev()

[ Upstream commit 1ddb815fdfd45613c32e9bd1f7137428f298e541 ]

The "dev->clt_device_id" variable is set using ida_alloc_max() which
returns an int and in particular it returns negative error codes.
Change the type from u32 to int to fix the error checking.

Fixes: c9b5645fd8ca ("block: rnbd-clt: Fix leaked ID in init_dev()")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>