This is caused by caching a pointer and reference to the data cache's
IPersistStorage interface without managing reference counts
appropriately.

ole32: Fix a typo in PropertyStorage_WritePropertyToStream that caused the wrong data to be written to the stream.

The field pClipData is a pointer to the data to be written, not the start of it.

This behavior was discovered by Huw Davies.

Make sure that mixing table columns returns the expected
data. eg:  SELECT t1.action, t2.action FROM t1, t2
should return distinct data.

Propagate tablename from 'SELECT tablename.column from tablename' queries
into VIEW_find_column(). Previously, the tablename had been dropped.

This makes cleanup after errors much easier, as we can just use the regular
destructor.