add SongManager::SetPreferences

stepmania/src/SongManager.cpp

@@ -688,6 +688,16 @@ void SongManager::RegenRandomTrailEntries()
 	}
 }
 
+void SongManager::SetPreferences()
+{
+	for( unsigned int i=0; i<m_pSongs.size(); i++ )
+	{
+		/* PREFSMAN->m_bAutogenSteps may have changed. */
+		m_pSongs[i]->RemoveAutoGenNotes();
+		m_pSongs[i]->AddAutoGenNotes();
+	}
+}
+
 void SongManager::GetAllCourses( vector<Course*> &AddTo, bool bIncludeAutogen )
 {
 	for( unsigned i=0; i<m_pCourses.size(); i++ )

stepmania/src/SongManager.h

@@ -36,6 +36,7 @@ public:
 	void FreeSongs();
 	void Cleanup();
 	void RegenRandomTrailEntries();
+	void SetPreferences();
 
 	void LoadAllFromProfiles();	// song, edits
 	void FreeAllLoadedFromProfiles();