listed with startdemos: run the game, go into a savegame or start a new
game, type F3 and press Esc enough times to go back to normal view, bring
down the console and enter "timedemo demo1". when the demo ends, the only
thing I was able to *see* was the loading label, no other activity at all,
although I can still do F10 (quit) and blindly press Y to exit the game,
so the engine didn't crash. problem was that CL_NextDemo() didn't check
if an actual nextdemo exists before calling SCR_BeginLoadingPlaque() which
set scr_drawloading to true, so scr_drawloading still remained as true..
fixed thusly.
git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@71 af15c1b1-3010-417e-b628-4374ebc0bcbd
