Fix broken shock roach death.

Fix hwgrunt not spinning down the minigun.
Other misc. fixes.

src/dlls/shockroach.cpp

@@ -153,7 +153,7 @@ void CMShockRoach::MonsterThink(void)
 	{
 		pev->health = -1;
 		Killed(pev, 0);
-		return;
+		//return; // it still needs to think
 	}
 
 	CMHeadCrab::MonsterThink();