http://www.sqlite.org/cvstrac/tktview?tn=2046

http://www.sqlite.org/cvstrac/tktview?tn=2046

The virtual table interface allows for a cursor to field multiple
xFilter() calls.  For instance, if a join is done with a virtual
table, there could be a call for each row which potentially matches.
Unfortunately, fulltextFilter() assumes that it has a fresh cursor,
and overwrites a prepared statement and a malloc'ed pointer, resulting
in unfinalized statements and a memory leak.

This change hacks the code to manually clean up offending items in
fulltextFilter(), emphasis on "hacks", since it's a fragile fix
insofar as future additions to fulltext_cursor could continue to have
the problem. (CVS 3521)

FossilOrigin-Name: 18142fdb6d1f5bfdbb1155274502b9a602885fcb