Create a 2D window and then manually focus a different window on your desktop, call SDL_PumpEvents() so the X11 driver sets its this->hidden->switch_waiting, then set a fullscreen OpenGL window (which makes the X11 driver tear down and create a new window instead of just resizing the existing one), poll for events, and the newly-created window will think it needs to pop back to a window. Fixed by resetting switch_waiting to zero if X11_CreateWindow() had to tear down a previous window.

## Makefile.am for the Dreamcast cdrom driver for SDL

noinst_LTLIBRARIES = libcdrom_dc.la
libcdrom_dc_la_SOURCES = $(SRCS)

# The SDL cdrom driver sources
SRCS = SDL_syscdrom.c