Thread: python - be: fix assertion trap.

Log Message:
-----------
fix assertion trap. If ErrorData is duplicated in the Error context, bad things
could happen.
Properly fetch the error's exception class.

Modified Files:
--------------
    be/src:
        error.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/error.c.diff?r1=1.3&r2=1.4)