Hook to fully wrap the EMPulseClass::Initialize for custom effects

[DCoder DCoder]

Since bug:856 wants more elaborate effects, a full wrap will be more effective than trying to hook in multiple times.

[AlexB (alexander-b)]

Indeed, creating EMPulseClass with negative EMP.Duration doesn't trigger anything. So no way to deal negative damage.

[DCoder DCoder (dcoder1337)]

And here we go:
DEFINE_HOOK(4C54E0, EMPulseClass_Initialize, 6)
{
 GET(EMPulseClass *, pThis, ECX);
 GET_STACK(TechnoClass *, pGenerator, 0x4);
 return 0x4C58B6;
}
This is called inside EMPulseClass::EMPulseClass.
TS implementation does the following:
for each AircraftClass::Array in range and InAir
 ->Crash()

for each UnitClass::Array in range
 ->EMPDurationRemaining
 if ->Locomotion->Is_Moving()
  ->Locomotion->Stop_Moving()
 ->Locomotion->Power_Off()
 ->Anim

for each BuildingClass::Array in range
 ->EMPDurationRemaining
 ->DisableStuff()
 if ->Radar
  ->Owner->RadarOutage
 ->Anim

more details will be added if necessary.

[AlexB (alexander-b)]

Some more hooks needed:
SuperWeaponClass::Update to disallow the timer to decrease when building EMP'd.
Propably BuildingClass::Update? The loop that reactivates the robot tanks when a control center gets back online. => Say no, if still EMP'd

[DCoder DCoder (dcoder1337)]

For the first one, use the SuperClass::SetOnHold I just committed to YR++ r304.
For the second one, see bug:866.