[Bug 45105] heap-buffer overflow in gdi32

https://bugs.winehq.org/show_bug.cgi?id=45105

Vincent Povirk  changed:

What    |Removed                     |Added
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--- Comment #1 from Vincent Povirk  ---
Lack of bounds checking is a more general problem in PlayEnhMetaFileRecord. We
don't check that the record itself is large enough for all its fields, or that
other variable-length fields fit.

I think it might be better to do the bounds checking in EnumEnhMetaFile. It's
unreasonable to expect individual applications to do exhaustive bounds checking
in their own enum callbacks.