NSMonster: Add 'dead' boolean spawn key. Will decide if the monster starts 'dead'

src/shared/NSMonster.h

@@ -236,6 +236,7 @@ capable of fighting if prompted to.
 
 ## KEYS - BEHAVIOUR
 - "health" : Starting health.
+- "dead" : Whether to start the monster in a dead state (0 or 1).
 - "team" : Alliance. See allianceState_t for which numerical values to pick.
 - "speed_walk" : Walk speed in units per second.
 - "speed_run" : Run speed in units per second.
@@ -499,6 +500,8 @@ private:
 	float _m_flMeleeDelay;
 	float _m_flBurstCount;
 	bool _m_bShouldThrow;
+	bool _m_bStartDead;
+	float _m_flFrame;
 
 	/* save these please */
 	float _m_flReloadTracker;

src/shared/NSMonster.qc

@@ -1664,6 +1664,16 @@ NSMonster::Respawn(void)
 	} else {
 		m_bWeaponDrawn = false;
 	}
+
+	/* start dead (corpse) */
+	if (_m_bStartDead) {
+		RemoveFlags(FL_MONSTER);
+		SetMovetype(MOVETYPE_NONE);
+		SetSolid(SOLID_CORPSE);
+		SetHealth(base_health);
+		SetState(MONSTER_DEAD);
+		SetFrame(_m_flFrame);
+	}
 }
 
 void
@@ -1818,6 +1828,13 @@ NSMonster::SpawnKey(string strKey, string strValue)
 	case "leap_damage":
 		m_flLeapDamage = Skill_GetDefValue(strValue);
 		break;
+	/* simple tweaks */
+	case "dead":
+		_m_bStartDead = ReadBool(strValue);
+		break;
+	case "frame":
+		_m_flFrame = ReadFloat(strValue);
+		break;
 	default:
 		NSSurfacePropEntity::SpawnKey(strKey, strValue);
 		break;