Revision 196

Removed argument icbmax of cv30_feed, not used in cv_driver (not used
in LMDZ either).

Clearer to have iflag1 = 0 in cv30_feed than in cv_driver. Clearer to
have iflag1 = 42 in cv30_uncompress than in cv_driver.

Removed argument iflag of cv30_compress. Since there is iflag1 = 42 in
cv30_uncompress, iflag1 that comes out of cv_driver is disconnected
from iflag1 computed by cv30_feed and cv30_trigger.

Removed some references to convect3 and convect4 in comments. This
program derives from the convect3 version, we do not need to know
about other versions.

Bug fix in cv30_undilute1: icbs1 was not made >= 2.