In extensions rtree, fts3 and fts5, ensure that when dynamic buffers are bound

to persistent SQL statements using SQLITE_STATIC, the binding is replaced with
an SQL NULL before the buffer is freed. Otherwise, a user may obtain a pointer
to the persistent statement using sqlite3_next_stmt() and attempt to access
the freed buffer using sqlite3_expanded_sql() or similar.

FossilOrigin-Name: 2a5f813bc61f9e780f2ccbda425611f65ad523b6d486a1e5e2b9d5e9f1d260a2

ext/rtree/rtreeG.test

@@ -59,6 +59,7 @@ do_test rtreeG-1.4log {
   set ::log
 } {}
 
+expand_all_sql db
 db close
 sqlite3_shutdown
 test_sqlite3_log