Another syntax bug, another cache force.

...alright, even I'm getting annoyed with this.

src/NotesLoaderSM.cpp

@@ -133,7 +133,8 @@ void SMLoader::ProcessAttackString( vector<RString> & attacks, MsdFile::value_t
 	{
 		RString tmp = params[s];
 		Trim(tmp);
-		attacks.push_back( tmp );
+		if (tmp.size() > 0)
+			attacks.push_back( tmp );
 	}
 }
 

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 = 194;
+const int FILE_CACHE_VERSION = 195;
 
 /** @brief How long does a song sample last by default? */
 const float DEFAULT_MUSIC_SAMPLE_LENGTH = 12.f;