Clean up symbol visibility.

--- decoders/timidity/instrum_dls.c.orig	Fri Jun  1 02:53:52 2012
+++ decoders/timidity/instrum_dls.c	Fri Jun  1 02:54:37 2012
@@ -51,9 +51,9 @@ typedef struct _RIFF_Chunk {
     struct _RIFF_Chunk *next;
 } RIFF_Chunk;
 
-extern DECLSPEC RIFF_Chunk* SDLCALL LoadRIFF(SDL_RWops *src);
-extern DECLSPEC void SDLCALL FreeRIFF(RIFF_Chunk *chunk);
-extern DECLSPEC void SDLCALL PrintRIFF(RIFF_Chunk *chunk, int level);
+extern RIFF_Chunk* LoadRIFF(SDL_RWops *src);
+extern void FreeRIFF(RIFF_Chunk *chunk);
+extern void PrintRIFF(RIFF_Chunk *chunk, int level);
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------*/
@@ -353,8 +353,8 @@ typedef struct _DLS_Data {
     const char *comments;
 } DLS_Data;
 
-extern DECLSPEC DLS_Data* SDLCALL LoadDLS(SDL_RWops *src);
-extern DECLSPEC void SDLCALL FreeDLS(DLS_Data *chunk);
+extern DLS_Data* LoadDLS(SDL_RWops *src);
+extern void FreeDLS(DLS_Data *chunk);
 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------*/