LU-16573 lnet: Check empty list in cfs_match_nid_net

LU-16573 lnet: Check empty list in cfs_match_nid_net

cfs_match_nid_net() needs to check whether the list of range
expressions describing the address is empty. Otherwise, for numeric
based addresses, we may hit the assert in libcfs_num_match().

Test-Parameters: trivial testlist=sanity-lnet
HPE-bug-id: LUS-11480
Signed-off-by: Chris Horn <chris.horn@hpe.com>
Change-Id: Id2460137607f5564751e729ee7b716d9151b5d37
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/50576
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>