Some code checks against the type of a CyclicList node, so we should
make sure that it's always initialized.

This eliminates the diff between Wine's and Windows XP's generated TLB
files.

This reduces the diff between the TLB file output by Wine and Windows XP
when running the typelib test module.

winex11: X11DRV_nores_SetCurrentMode return DISP_CHANGE_SUCCESSFUL when switching to the current mode.

Based on a patch by Adam Romanek.