- fixed attached dynamic light setup.

This was only run on a state change and missed every external light change.
Any place which wants to flag a light change now only will set a flag and at the end of the thinker loop all flagged actors will be processed.
For performance reasons this was merged with the P_RunEffects iterator loop.

src/playsim/p_mobj.cpp

@@ -577,7 +577,7 @@ bool AActor::SetState (FState *newstate, bool nofunction)
 		newstate = newstate->GetNextState();
 	} while (tics == 0);
 
-	SetDynamicLights();
+	flags8 |= MF8_RECREATELIGHTS;
 	return true;
 }
 
@@ -4702,9 +4702,9 @@ void AActor::CallBeginPlay()
 
 void AActor::PostBeginPlay ()
 {
-	SetDynamicLights();
 	PrevAngles = Angles;
 	flags7 |= MF7_HANDLENODELAY;
+	flags8 |= MF8_RECREATELIGHTS;
 }
 
 void AActor::CallPostBeginPlay()