DXDIAG: 3rd DirectDraw test has broken (fullscreen bouncing white square)

Steps to reproduce:

• Start ReactOS Live CD
• Press Win+R, type dxdiag and hit Enter
• Go to "Display 1" page and press "Test DirectDraw"
• First two windowed tests will pass without problems
• Third fullscreen test will show just a black screen that does not close

It's possible to close it with Alt+F4 and then exit DxDiag the same way, after that it will restore screen resolution.

This didn't happened before, and the test was passing:

0.4.15-dev-5351-gf1908c8	0.4.15-dev-5352-g6755921
0.4.15-dev-5351-gf1908c8.txt	0.4.15-dev-5352-g6755921.txt

Without first chance exception handling there is only one debug message error:

err:(win32ss/user/user32/windows/message.c:1556) Exception Dialog unicode 004020B0 Msg 273 pti FFB15CF8 Wndpti FFB15CF8

However with first chance exception handling (0.4.15-dev-5352-g6755921-firstchance.txt) there is a stacktrace:

Entered debugger on first-chance exception (Exception Code: 0xc0000005) (Page Fault)

Memory at 0x00000118 could not be accessed

kdb:> bt

Eip:

* <d3dwine.dll:b310a (dll/directx/wine/wined3d/texture.c:3271 (wined3d_texture_blt))>

Frames:

* <ddraw.dll:28dbf (dll/directx/wine/ddraw/surface.c:79 (ddraw_surface_update_frontbuffer))>