XSB Src (SVN)-old

Added a little documentation about the memory structure and layout of
dynamic buffers.

Fixed arity bug in bagPO/4, in call to breg_retskel.
CHAT doesn't use the arity, but slgwam does.

Fixed a memory leak, in how findall returns buffers.

* introduction of a new operand type of instruction (B), to distinguish
between integer constants that should/shoudn't be tagged at
load-time.

* load-time tagging is always performed, now (not a configure option,
anymore).

Tanya: maxcursors applies to each connection, not to total as previously.

Added check for overflow in ctop_int to give an error message if
and integer is passed back to Prolog that has lost some bits.

Fix bug with HDBC handles for multiple connections.
Brittle fix: need to keep numcursors separately for each connection.

Fixed bug in odbc_query on inconsistent handling of connection handle.

Fixed date to use updated file_op preds, and minor changes to date function.
(by Tatyana Vidrevich)

moved a buff_word so don't get word if not necessary (prevents irrelevant overflow)