[Bug 33001] TREEVIEW_GetItemT crashes on invalid item pointer

http://bugs.winehq.org/show_bug.cgi?id=33001

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|TREEVIEW_GetItemT crashes   |TREEVIEW_GetItemT crashes
                   |when getting item from      |on invalid item pointer
                   |different tree              |

--- Comment #2 from Nikolay Sivov  2013-02-17 22:52:02 CST ---
This is about handling garbage pointer value as item pointer, it could be fixed
with exception handler of course, but it needs tests.