Fixed mistake that caused steps from non-ssc or non-sm files have blank StepsTypeStr.

src/Song.cpp

@@ -42,7 +42,7 @@
  * @brief The internal version of the cache for StepMania.
  *
  * Increment this value to invalidate the current cache. */
-const int FILE_CACHE_VERSION = 221;
+const int FILE_CACHE_VERSION = 222;
 
 /** @brief How long does a song sample last by default? */
 const float DEFAULT_MUSIC_SAMPLE_LENGTH = 12.f;

src/Steps.cpp

@@ -268,6 +268,10 @@ void Steps::TidyUpData()
 	{
 		LOG->Warn("Detected steps with unknown style '%s' in '%s'", m_StepsTypeStr.c_str(), m_pSong->m_sSongFileName.c_str());
 	}
+	else if(m_StepsTypeStr == "")
+	{
+		m_StepsTypeStr= GAMEMAN->GetStepsTypeInfo(m_StepsType).szName;
+	}
 
 	if( GetDifficulty() == Difficulty_Invalid )
 		SetDifficulty( StringToDifficulty(GetDescription()) );