Make all uses of the Steps* in the TrailEntry class use an accessor method.

This makes it simple to switch to something else, such as using a StepsId
instead of a Steps*.

stepmania/src/Course.cpp

@@ -349,7 +349,7 @@ bool Course::GetTrailSorted( StepsType st, CourseDifficulty cd, Trail &trail ) c
 		{
 			SortTrailEntry ste;
 			ste.entry = trail.m_vEntries[i];
-			ste.SortMeter = SortTrail.m_vEntries[i].pSteps->GetMeter();
+			ste.SortMeter = SortTrail.m_vEntries[i].GetSteps()->GetMeter();
 			entries.push_back( ste );
 		}
 
@@ -567,7 +567,7 @@ bool Course::GetTrailUnsorted( StepsType st, CourseDifficulty cd, Trail &trail )
 
 		TrailEntry te;
 		te.pSong = resolved.pSong;
-		te.pSteps = resolved.pSteps;
+		te.SetSteps(resolved.pSteps);
 		te.Modifiers = e->sModifiers;
 		te.Attacks = e->attacks;
 		te.bSecret = e->bSecret;

stepmania/src/CourseEntryDisplay.cpp

@@ -173,7 +173,7 @@ void CourseEntryDisplay::SetFromGameState( int iCourseEntryIndex )
 			const TrailEntry *te = tes[pn];
 			if( te == NULL )
 				continue;
-			SetDifficulty( pn, ssprintf("%d", te->pSteps->GetMeter()), te->pSteps->GetDifficulty() );
+			SetDifficulty( pn, ssprintf("%d", te->GetSteps()->GetMeter()), te->GetSteps()->GetDifficulty() );
 		}
 
 		m_TextBanner.LoadFromSong( te->pSong );

stepmania/src/PlayerOptions.cpp

@@ -630,7 +630,7 @@ bool PlayerOptions::IsEasierForCourseAndTrail( Course* pCourse, Trail* pTrail )
 
 	FOREACH_CONST( TrailEntry, pTrail->m_vEntries, e )
 	{
-		if( e->pSong && IsEasierForSongAndSteps(e->pSong, e->pSteps, PLAYER_1) )
+		if( e->pSong && IsEasierForSongAndSteps(e->pSong, e->GetSteps(), PLAYER_1) )
 			return true;
 	}
 	return false;

stepmania/src/ScreenGameplay.cpp

@@ -850,8 +850,8 @@ void ScreenGameplay::InitSongQueues()
 			pi->m_asModifiersQueue.clear();
 			FOREACH_CONST( TrailEntry, pTrail->m_vEntries, e )
 			{
-				ASSERT( e->pSteps );
-				pi->m_vpStepsQueue.push_back( e->pSteps );
+				ASSERT( e->GetSteps() );
+				pi->m_vpStepsQueue.push_back( e->GetSteps() );
 				AttackArray a;
 				e->GetAttackArray( a );
 				pi->m_asModifiersQueue.push_back( a );

stepmania/src/SongManager.cpp

@@ -1144,7 +1144,7 @@ bool SongManager::GetExtraStageInfoFromCourse( bool bExtra2, RString sPreferredG
 	}
 
 	pSongOut = pTrail->m_vEntries[0].pSong;
-	pStepsOut = pTrail->m_vEntries[0].pSteps;
+	pStepsOut = pTrail->m_vEntries[0].GetSteps();
 	return true;
 }
 

stepmania/src/Trail.cpp

@@ -30,6 +30,16 @@ bool TrailEntry::operator== ( const TrailEntry &rhs ) const
 		EQUAL(dc);
 }
 
+Steps *TrailEntry::GetSteps() const
+{
+	return pSteps;
+}
+
+void TrailEntry::SetSteps(Steps *steps)
+{
+	pSteps = steps;
+}
+
 bool TrailEntry::ContainsTransformOrTurn() const
 {
 	PlayerOptions po;
@@ -68,7 +78,7 @@ const RadarValues &Trail::GetRadarValues() const
 
 		FOREACH_CONST( TrailEntry, m_vEntries, e )
 		{
-			const Steps *pSteps = e->pSteps;
+			const Steps *pSteps = e->GetSteps();
 			ASSERT( pSteps );
 			/* Hack: don't calculate for autogen entries; it makes writing Catalog.xml
 			 * take way too long.  (Tournamix 4 Sample.crs takes me ~10s.) */
@@ -120,7 +130,7 @@ int Trail::GetTotalMeter() const
 	int iTotalMeter = 0;
 	FOREACH_CONST( TrailEntry, m_vEntries, e )
 	{
-		iTotalMeter += e->pSteps->GetMeter();
+		iTotalMeter += e->GetSteps()->GetMeter();
 	}
 
 	return iTotalMeter;

stepmania/src/Trail.h

@@ -13,6 +13,7 @@ struct lua_State;
 
 struct TrailEntry
 {
+public:
 	TrailEntry(): 
 		pSong(NULL), 
 		pSteps(NULL),
@@ -22,7 +23,10 @@ struct TrailEntry
 		dc(Difficulty_Invalid)
 	{
 	}
-	void GetAttackArray( AttackArray &out ) const;
+	void		GetAttackArray( AttackArray &out ) const;
+	Steps*		GetSteps() const;
+	void		SetSteps(Steps *steps);
+	bool		ContainsTransformOrTurn() const;
 
 	Song*		pSong;
 	Steps*		pSteps;
@@ -37,7 +41,6 @@ struct TrailEntry
 	Difficulty	dc;
 	bool operator== ( const TrailEntry &rhs ) const;
 	bool operator!= ( const TrailEntry &rhs ) const { return !(*this==rhs); }
-	bool ContainsTransformOrTurn() const;
 };
 
 class Trail