XFB fix for single-core mode

[Luigi__]

The text homebrews take forever to load without XFB enabled. XFB only worked in dual-core mode. I did a small fix that makes it work in single-core mode as well.

I modified the Video_UpdateXFB() function in the OGL plugin (main.cpp, line 321). The changed lines are prefixed with '+++'.

Code:

void Video_UpdateXFB(u8* _pXFB, u32 _dwWidth, u32 _dwHeight, s32 _dwYOffset, bool scheduling)
{
    if (g_Config.bUseXFB && XFB_isInit())
    {
        if (scheduling) // from CPU in DC without fifo&CP (some 2D homebrews)
        {
            XFB_SetUpdateArgs(_pXFB, _dwWidth, _dwHeight, _dwYOffset);
            g_XFBUpdateRequested = TRUE;
        }
        else
        {
            if (_pXFB) // from CPU in SC mode
+++            {
                XFB_Draw(_pXFB, _dwWidth, _dwHeight, _dwYOffset);
+++                g_VideoInitialize.pCopiedToXFB();
+++            }
            else // from GP in DC without fifo&CP (some 2D homebrews)
            {
                XFB_Draw();
                g_XFBUpdateRequested = FALSE;
            }
        }
    }
}

Is it right? Or has it already been tried but dropped it didn't work?

EDIT: attached a patch. I had to upload it as a text file. Rename it to 'xfb_single_core.patch' .