fix size of entity_state_t (it was 98 bytes, now 96 bytes)

fix size of entity_state_t (it was 98 bytes, now 96 bytes)
reduce memory usage by having server update render flags on
exteriormodeltoclient entities for each player they are sent to rather
than copying the entire entity_state_t array and modifying it, now the
EntityFrame*_WriteFrame functions take a pointer array

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9810 d7cf8633-e32d-0410-b094-e92efae38249