gtestutils: Allow cmpmem() arguments to be NULL iff lengths are zero
Document this and add a test.
Signed-off-by: Philip Withnall withnall@endlessm.com
Fixes: #1897 (closed)
Document this and add a test.
Signed-off-by: Philip Withnall withnall@endlessm.com
Fixes: #1897 (closed)