Get Loader and Writer set up for these segments.

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 = 165;
+const int FILE_CACHE_VERSION = 166;
 
 /** @brief How long does a song sample last by default? */
 const float DEFAULT_MUSIC_SAMPLE_LENGTH = 12.f;
@@ -782,6 +782,15 @@ void Song::TidyUpData()
 		seg.m_iTicks = 2;
 		m_Timing.m_TickcountSegments.push_back( seg );
 	}
+	
+	// Have a default combo segment of one just in case.
+	if( m_Timing.m_ComboSegments.empty() )
+	{
+		ComboSegment seg;
+		seg.m_iStartRow = 0;
+		seg.m_iCombo = 1;
+		m_Timing.m_ComboSegments.push_back( seg );
+	}
 }
 
 void Song::TranslateTitles()