Remove some checks from AvatarPhysical updates

These checks introduced a hidden race condition. If the initial avatar
physical update comes in after the initial avatar update (always happens
on DirtSand, never happens on MOUL), then the physical update could be
rejected if the avatar is sitting on the ground or on a sitting modifier
(this adds stages, which count as a task). This results in seeing an
avatar sitting at the link in point. Whoops!

I can think of no cases where these checks are actually useful. It's also
difficult to determine if we are linking in due to the fact that we're in
the grey area between loading the entire age and fading the screen. All
flags indicate we're in the age. This is just the best way to fix it(TM)

Sources/Plasma/PubUtilLib/plAvatar/plAvatarSDLModifier.cpp

@@ -116,12 +116,8 @@ void plAvatarPhysicalSDLModifier::ISetCurrentStateFrom(const plStateDataRecord*
     {
         const plArmatureMod* kAvMod = (plArmatureMod*)sObj->GetModifierByType(plArmatureMod::Index());
         plArmatureMod * avMod = const_cast<plArmatureMod *>(kAvMod);
-        if(avMod && !avMod->GetCurrentBrain()->IsRunningTask())
+        if(avMod)
         {
-            plAvBrainGeneric* genBrain = plAvBrainGeneric::ConvertNoRef(avMod->GetCurrentBrain());
-            if (genBrain && (genBrain->GetType() == plAvBrainGeneric::kLadder || genBrain->GetType() == plAvBrainGeneric::kSit || genBrain->GetType() == plAvBrainGeneric::kSitOnGround))
-                return;
-
             plSimpleStateVariable* worldVar = srcState->FindVar(kStrSubworld);
             if (worldVar->IsDirty() && avMod->fController)
             {