minor bug

file.error

Part is null. It should be set before PostAdd for MakeshiftRArm.
Verse.Log:Error(String, Boolean)
Verse.Hediff_AddedPart:PostAdd(Nullable`1)
Verse.HediffSet:AddDirect_Patch0(Object, Hediff, Nullable`1, DamageResult)
Verse.Pawn_HealthTracker:AddHediff_Patch2(Object, Hediff, BodyPartRecord, Nullable`1, DamageResult)
Verse.Pawn_HealthTracker:AddHediff(HediffDef, BodyPartRecord, Nullable`1, DamageResult)
AlienRace.<>c__DisplayClass25_0:<GenerateInitialHediffsPostfix>b__3(HediffDef)
System.Collections.Generic.List`1:ForEach(Action`1)
AlienRace.HarmonyPatches:GenerateInitialHediffsPostfix(Pawn)
Verse.PawnGenerator:GenerateInitialHediffs_Patch1(Pawn, PawnGenerationRequest)
Verse.PawnGenerator:TryGenerateNewPawnInternal_Patch0(PawnGenerationRequest&, String&, Boolean, Boolean)
Verse.PawnGenerator:GenerateNewPawnInternal(PawnGenerationRequest&)
Verse.PawnGenerator:GenerateOrRedressPawnInternal(PawnGenerationRequest)
Verse.PawnGenerator:GeneratePawn_Patch3(PawnGenerationRequest)
aRandomKiwi.ATPP.GeneratePawn_Patch:Listener(PawnGenerationRequest, Pawn&)
Verse.PawnGenerator:GeneratePawn_Patch3(PawnGenerationRequest)
Verse.PawnGenerator:GeneratePawn_Patch1(PawnKindDef, Faction)
RimWorld.Faction:GenerateNewLeader()
Planets_Code.FactionGenerator_NewGeneratedFaction:Prefix(FactionDef, Faction&)
RimWorld.FactionGenerator:NewGeneratedFaction_Patch1(FactionDef)
RimWorld.FactionGenerator:GenerateFactionsIntoWorld_Patch1()
RimWorld.Planet.WorldGenStep_Factions:GenerateFresh(String)
RimWorld.Planet.WorldGenerator:GenerateWorld(Single, String, OverallRainfall, OverallTemperature)
Planets_Code.Planets_CreateWorldParams:<CanDoNext>b__0()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__1()