- fixed ma_valid in cmm_mdsnum_check();

- fixed ma_valid in cmm_mdsnum_check();
- fixes in cmm_try_to_split();
- added error messages to cmm_try_to_split();
- cache mdsnum for lmv slaves so that we need not to lookup them all the time. This reduces number of fld cache lookups from ~46000 to ~12000 on sanity 24o.