Sync split scripts, more misc splits/doc

src/event_data.c

@@ -213,7 +213,7 @@ static bool8 IsFlagOrVarStoredInQuestLog(u16 idx, bool8 isVar)
     }
     else
     {
-        if (idx < VAR_0x4030 - VARS_START)
+        if (idx < VAR_ICE_STEP_COUNT - VARS_START)
             return FALSE;
         if (idx >= VAR_MAP_SCENE_PALLET_TOWN_OAK - VARS_START && idx < VAR_PORTHOLE - VARS_START)
             return FALSE;

src/field_tasks.c

@@ -268,7 +268,7 @@ static void CrackedFloorPerStepCallback(u8 taskId)
         if (MetatileBehavior_ReturnFalse_13(behavior))
         {
             if (GetPlayerSpeed() != 4)
-                VarSet(VAR_0x4030, 0);
+                VarSet(VAR_ICE_STEP_COUNT, 0);
 
             if (data[4] == 0)
             {