Remove RageFile::Rewind() calls. The original notion was that rewinding is

often simpler than seeking; that some drivers may only support rewinding;
and that, if supported, rewinding should never fail.  However, there's really
no reason for it to be a separate API call.

stepmania/src/RageSoundReader_MP3.cpp

@@ -754,7 +754,7 @@ int RageSoundReader_MP3::Read( char *buf, unsigned len )
 
 bool RageSoundReader_MP3::MADLIB_rewind()
 {
-	this->file.Rewind();
+	this->file.Seek(0);
 			
 	mad_frame_mute(&mad->Frame);
 	mad_synth_mute(&mad->Synth);