[sm130futures] Deal with blank lines on write.

Yes, it's another cache restarter.

src/NotesWriterSSC.cpp

@@ -325,6 +325,7 @@ static RString GetSSCNoteData( const Song &song, const Steps &in, bool bSavingCa
 
 	lines.push_back( song.m_vsKeysoundFile.empty() ? "#NOTES:" : "#NOTES2:" );
 
+	TrimLeft(sNoteData);
 	split( sNoteData, "\n", lines, true );
 	lines.push_back( ";" );
 

src/Song.cpp

@@ -41,7 +41,7 @@
  * @brief The internal version of the cache for StepMania.
  *
  * Increment this value to invalidate the current cache. */
-const int FILE_CACHE_VERSION = 169;
+const int FILE_CACHE_VERSION = 170;
 
 /** @brief How long does a song sample last by default? */
 const float DEFAULT_MUSIC_SAMPLE_LENGTH = 12.f;