[X11] Enabling fsaa via the video options menu breaks video output
On Linux, at least, enabling fsaa via the video options menu will result in the engine no longer drawing frames. This issue appears to persist between sessions and requires that `-nofsaa` be passed at startup in order to uncheck the appropriate option.
During the bugs effect, the engine is other perfectly operable, e.g., games can (apparently) be started and audio output can be heard.
There appears to be no complaint on stdout/err when the option is selected, but the effect is immediately apparent as graphics output will be frozen from that point onward.