Don't die due to invalid data. (We should be able to hose any

given piece of any song and still load cleanly.  It's fine to die due
to things that shouldn't be bad--such as themes--but we should be
very tolerant of songs.)

stepmania/src/NoteData.cpp

@@ -637,7 +637,14 @@ void NoteDataUtil::LoadFromSMNoteDataString( NoteData &out, CString sSMNoteData
 				case '1': t = TAP_TAP; break;
 				case '2': t = TAP_HOLD_HEAD; break;
 				case '3': t = TAP_HOLD_TAIL; break;
-				default: ASSERT(0); t = TAP_EMPTY; break;
+				
+				default: 
+					/* Invalid data.  We don't want to assert, since there might
+					 * simply be invalid data in an .SM, and we don't want to die
+					 * due to invalid data.  We should probably check for this when
+					 * we load SM data for the first time ... */
+					// ASSERT(0); 
+					t = TAP_EMPTY; break;
 				}
 
 				out.SetTapNote(c, iIndex, t);