rtla: Fix uninitialized variable found

rtla: Fix uninitialized variable found

[ Upstream commit 696444a544ecd6d62c1edc89516b376cefb28929 ]

Variable found is not being initialized, in the case where the desired
mount is not found the variable contains garbage. Fix this by initializing
it to zero.

Link: https://lore.kernel.org/all/20230727150117.627730-1-colin.i.king@gmail.com/
Fixes: a957cbc02531 ("rtla: Add -C cgroup support")
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>