Fix reading 4 byte UTF-8 text input
Don't use dead view angles after stop following a dead player

If ps.stats[STAT_HEALTH] is less or equal to 0, cgame uses fixed view angles.
When stop following a player, make sure health isn't less or equal to 0.
When player stops following a player, keep view angles

Now player keeps looking the same direction instead of facing somewhere else
which is slightly disorienting.