winex11: Fix GetDIBits with monochrome pixmaps.

dlls/gdi32/tests/bitmap.c

@@ -1552,7 +1552,6 @@ todo_wine
     }
 
     /* returned bits are DWORD aligned and upside down */
-todo_wine
     ok(!memcmp(buf, dib_bits_24, sizeof(dib_bits_24)), "DIB bits don't match\n");
     DeleteObject(hbmp);
 

dlls/winex11.drv/dib.c

@@ -4039,7 +4039,7 @@ INT X11DRV_GetDIBits( X11DRV_PDEVICE *physDev, HBITMAP hbitmap, UINT startscan,
 
   bitmap_type = DIB_GetBitmapInfo( (BITMAPINFOHEADER*)info, &width, &tempHeight, &descr.infoBpp, &descr.compression);
 
-  if (physDev->depth > 1)
+  if (physBitmap->pixmap_depth > 1)
   {
     GetPaletteEntries( GetCurrentObject( physDev->hdc, OBJ_PAL ), 0, 256, palette );
   }