Fix compile...and I think fix the save problem.

Not the best way to do this perhaps, but it's something.

src/ScreenEdit.cpp

@@ -2867,7 +2867,9 @@ void ScreenEdit::HandleScreenMessage( const ScreenMessage SM )
 			if( (*s)->IsAutogen() )
 				continue;
 			// If the notedata has content, let it go.
-			if( !(*s)->m_NoteData->IsEmpty() )
+			NoteData tmp;
+			(*s)->GetNoteData(tmp);
+			if( !tmp.IsEmpty() )
 				continue;
 			// It's hard to say if these steps were saved to disk or not.
 			/*