Mech phase 4: non-NULL default roster slots -- boot reaches the attribute binding

Unrecognised subsystem classIDs now get a base MechSubsystem (Laser/ParticleCannon
-> Emitter) so control/damage bindings that resolve a subsystemID find a real
subsystem, not a NULL plug. This moved the boot PAST the first Link::AddToPlug
NULL-deref; it now runs to Simulation::GetAttributePointer -- the subsystem
ATTRIBUTE system. Each reconstructed subsystem currently reuses the base
Subsystem::AttributeIndex, but the streamed control-mapping / gauge bindings
reference subsystem-specific published attributes (Sensor RadarPercent, Generator
OutputVoltage, Emitter ChargeLevel, ...) that aren't in the base index -> the
attribute lookup walks off the end. Reconstructing each subsystem's AttributeIndex
(+ plug/capability-chain wiring) is the phase-5 integration. BT: 42 ok.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

restoration/source410/BT/MECH.CPP

@@ -274,14 +274,25 @@ Mech::Mech(
 		case MechTechClassID:
 			made = new MechTech(this, id, (MechTech::SubsystemResource *)seg);
 			break;
+		case EmitterClassID + 1:	// LaserClassID -- an Emitter energy weapon
+		case EmitterClassID + 2:	// ParticleCannonClassID -- an Emitter energy weapon
+			made = new Emitter(this, id, (Emitter::SubsystemResource *)seg);
+			++weaponCount;
+			break;
+
 		default:
 			//
-			// Unrecognised / not-yet-reconstructed subsystem class (e.g.
-			// Laser, ParticleCannon, Capacitor, AmmoFeeder, Radar, Turret):
-			// leave the slot NULL so the roster stays aligned rather than
-			// aborting the whole mech.
+			// Unrecognised / not-yet-reconstructed subsystem class (Capacitor,
+			// AmmoFeeder, Radar, Turret, ...): give the slot a base
+			// MechSubsystem so control/damage bindings that resolve this
+			// subsystemID find a real (if generic) subsystem rather than a NULL
+			// plug.  The roster stays aligned.
 			//
-			made = NULL;
+			made = new MechSubsystem(
+				this, id,
+				(MechSubsystem::SubsystemResource *)seg,
+				MechSubsystem::DefaultData
+			);
 			break;
 		}