Invalidate trail caches for edit courses on unlocks.

stepmania/src/SongManager.cpp

@@ -811,6 +811,17 @@ void SongManager::DeleteCourse( Course *pCourse )
 	RefreshCourseGroupInfo();
 }
 
+void SongManager::InvalidateCachedTrails()
+{
+	FOREACH_CONST( Course *, m_pCourses, pCourse )
+	{
+		const Course &c = **pCourse;
+		
+		if( c.IsAnEdit() )
+			c.m_TrailCache.clear();
+	}
+}
+
 /* Called periodically to wipe out cached NoteData.  This is called when we change
  * screens. */
 void SongManager::Cleanup()

stepmania/src/SongManager.h

@@ -50,7 +50,7 @@ public:
 	void FreeCourses();
 	void AddCourse( Course *pCourse );	// transfers ownership of pCourse
 	void DeleteCourse( Course *pCourse );	// transfers ownership of pCourse
-
+	void InvalidateCachedTrails();
 
 	void InitAll( LoadingWindow *ld );	// songs, courses, groups - everything.
 	void Reload( bool bAllowFastLoad, LoadingWindow *ld=NULL );	// songs, courses, groups - everything.

stepmania/src/UnlockManager.cpp

@@ -593,6 +593,7 @@ void UnlockManager::UnlockEntryID( RString sEntryID )
 			PROFILEMAN->GetProfile(pn)->m_UnlockedEntryIDs.insert( sEntryID );
 
 	PROFILEMAN->GetMachineProfile()->m_UnlockedEntryIDs.insert( sEntryID );
+	SONGMAN->InvalidateCachedTrails();
 }
 
 void UnlockManager::UnlockEntryIndex( int iEntryIndex )