Add particle effect for Devastator's locked-fire mode

Currently it's the same as Heavy Rifle's one. But can be changed
in future.

Author: geotavros

src/game/shared/swarm/asw_weapon_devastator_shared.cpp

@@ -270,3 +270,24 @@ void CASW_Weapon_Devastator::DisableLockFire()
 		WeaponSound( BURST );
 	}
 }
+
+#ifdef CLIENT_DLL
+void CASW_Weapon_Devastator::ClientThink()
+{
+	BaseClass::ClientThink();
+
+	if ( m_bLockedFire != m_hLockedFireParticle.IsValid() )
+	{
+		if ( m_bLockedFire )
+		{
+			m_hLockedFireParticle.Set( ParticleProp()->Create( "buffgrenade_attach_arc", PATTACH_POINT_FOLLOW, "eject1" ) );
+			ParticleProp()->AddControlPoint( m_hLockedFireParticle, 1, this, PATTACH_POINT_FOLLOW, "muzzle" );
+		}
+		else
+		{
+			ParticleProp()->StopEmissionAndDestroyImmediately( m_hLockedFireParticle.GetObject() );
+			m_hLockedFireParticle.Set( NULL );
+		}
+	}
+}
+#endif

src/game/shared/swarm/asw_weapon_devastator_shared.h

@@ -39,6 +39,8 @@ class CASW_Weapon_Devastator : public CASW_Weapon_Assault_Shotgun
 #else
 	virtual const char *GetPartialReloadSound( int iPart );
 	virtual bool HasSecondaryExplosive(void) const { return false; }
+	virtual void ClientThink() override;
+
 #endif
 	virtual const char *GetMagazineGibModelName() const override { return "models/weapons/empty_clips/devastator_empty_clip.mdl"; }
 	virtual bool HasSecondaryAttack() override;
@@ -48,6 +50,10 @@ class CASW_Weapon_Devastator : public CASW_Weapon_Assault_Shotgun
 protected:
 	CNetworkVar( bool, m_bLockedFire );
 
+#ifdef CLIENT_DLL
+	HPARTICLEFFECT m_hFastFireParticle;
+#endif
+
 	void DisableLockFire();
 };