don't use istring here

stepmania/src/NotesLoader.h

@@ -3,7 +3,6 @@
 #ifndef NOTES_LOADER_H
 #define NOTES_LOADER_H
 
-#include "RageUtil.h"
 #include <set>
 
 class Song;
@@ -13,11 +12,11 @@ class NotesLoader
 protected:
 	virtual void GetApplicableFiles( const RString &sPath, vector<RString> &out )=0;
 
-	set<istring> BlacklistedImages;
+	set<RString> BlacklistedImages;
 
 public:
 	virtual ~NotesLoader() { }
-	const set<istring> &GetBlacklistedImages() const { return BlacklistedImages; }
+	const set<RString> &GetBlacklistedImages() const { return BlacklistedImages; }
 	static void GetMainAndSubTitlesFromFullTitle( const RString &sFullTitle, RString &sMainTitleOut, RString &sSubTitleOut );
 	virtual bool LoadFromDir( const RString &sPath, Song &out ) = 0;
 	virtual void TidyUpData( Song &song, bool cache ) { }

stepmania/src/NotesLoaderDWI.cpp

@@ -525,7 +525,8 @@ bool DWILoader::LoadFromDWIFile( const RString &sPath, Song &out )
 
 				pos = endpos + 1;
 
-				BlacklistedImages.insert( sub.c_str() );
+				sub.ToLower();
+				BlacklistedImages.insert( sub );
 			}
 		}
 		else

stepmania/src/Song.cpp

@@ -192,7 +192,7 @@ NotesLoader *Song::MakeLoader( RString sDir ) const
 
 /* Hack: This should be a parameter to TidyUpData, but I don't want to
  * pull in <set> into Song.h, which is heavily used. */
-static set<istring> BlacklistedImages;
+static set<RString> BlacklistedImages;
 
 /*
  * If PREFSMAN->m_bFastLoad is true, always load from cache if possible. Don't read
@@ -641,7 +641,9 @@ void Song::TidyUpData()
 			break; /* done */
 
 		// ignore DWI "-char" graphics
-		if( BlacklistedImages.find( arrayImages[i].c_str() ) != BlacklistedImages.end() )
+		RString sLower = arrayImages[i];
+		sLower.ToLower();
+		if( BlacklistedImages.find(sLower) != BlacklistedImages.end() )
 			continue;	// skip
 		
 		// Skip any image that we've already classified