[PATCH] Fix FetchRefcursors issues

Hi all,

I've created a patch (attached) that fixes some issues with the automatic
fetching of refcursors from a function/procedure (the
FetchRefcursors setting). It includes updates to the tests.

Below is a summary of the patch:
1. Fix crash if error occurs when fetching noninitial refcursor
2. Fix error when fetching NULL refcursor
3. Return empty result if all refcursors are NULL

Regards,

Adrian Grucza
Technical Lead
Tel: +61390185800
adrian(dot)grucza(at)iress(dot)com
www.iress.com
Level 16 385 Bourke St
Melbourne, Victoria, 3000
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