widl: Structures and arrays with pointers should be complex when generating code for 64-bit platforms.

The non-complex variants depend on the wire size of the
structure/array matching the buffer size, but this no longer applies
when pointers are 8 bytes instead of 4.

mshtml: Check for the container's doc being NULL in nsTooltipListener_OnShowTooltip and nsTooltipListener_OnHideTooltip.

They could be called after NSContainer_Release is called.

On WM_DESTROY the editor was getting freed, then it was used to obtain
a handle to the editor.  This patch moves it just before the editor is
freed within ME_DestroyEditor.

widl: Store the size of a pointer in a variable instead of hardcoding the value of the host compiler.

The exact type can depend on the size of the type in memory, and that
can vary depending on whether we are generating 32-bit or 64-bit code.