[Patch] Interprocess message processing bug in user32.dll

[Andrey Panov]

Hello!
	This is a fix for bug in user32.dll.

	In get_buffer_space() function, HeapReAlloc() will not allocate memory, if 
passed *buffer value is NULL. This happens, for example, when 
MSG_peek_message() receives a WM_GETTEXT message.

	Patch is against 20040505 release.
-- 
	Andrey
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