Countdown Timer

[Geoff Joy]

Timer displays 10, 8, 7, 6, 5, 4, 3, 2, 1 in HUD at match start and final 10 seconds of match, skipping 9. This is due to computation error in CountDown() function when calculating seconds left.

Suggested remedy: use level.framenum instead of level.time (int vs float) get rid of tenths digit and eliminate use of ceil() function.

[Geoff Joy]

This is only an issue if warmup time is in the neighborhood of 10 seconds. Changed default warmup_time to 30 seconds and added minimum limit of 30 seconds to GameInit. Set warmup_time "0" still turns it off.