[FluidSynth] Provide support for FluidSynth 2.x

[Wohlstand]

FluidSynth 1 and 2 are not compatible:

/home/stephane/extsvn/SDL-Mixer-X.git/trunk/src/codecs/music_fluidsynth.c: In function 'FLUIDSYNTH_Load':
/home/stephane/extsvn/SDL-Mixer-X.git/trunk/src/codecs/music_fluidsynth.c:69:21: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
     fluidsynth.FUNC = FUNC;
                     ^
/home/stephane/extsvn/SDL-Mixer-X.git/trunk/src/codecs/music_fluidsynth.c:81:9: note: in expansion of macro 'FUNCTION_LOADER'
         FUNCTION_LOADER(delete_fluid_player, int (*)(fluid_player_t*))
         ^~~~~~~~~~~~~~~
/home/stephane/extsvn/SDL-Mixer-X.git/trunk/src/codecs/music_fluidsynth.c:69:21: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
     fluidsynth.FUNC = FUNC;
                     ^
/home/stephane/extsvn/SDL-Mixer-X.git/trunk/src/codecs/music_fluidsynth.c:83:9: note: in expansion of macro 'FUNCTION_LOADER'
         FUNCTION_LOADER(delete_fluid_synth, int (*)(fluid_synth_t*))

It's need to provide the dual support of both FS 1 and 2 with accurate identification of each FluidSynth version.

[Wohlstand]

A little patch given by StefG:

~/extsvn/SDL-Mixer-X.git/trunk/src/codecs $svn diff
Index: music_fluidsynth.c
===================================================================
--- music_fluidsynth.c   (révision 242)
+++ music_fluidsynth.c   (copie de travail)
@@ -32,14 +32,19 @@
 
 #include <fluidsynth.h>
 
+#if FLUIDSYNTH_VERSION_MAJOR >= 2
+   #define DELETE_RETURNTYPE void
+#else
+   #define DELETE_RETURNTYPE int
+#endif
 
 typedef struct {
     int loaded;
     void *handle;
 
-    int (*delete_fluid_player)(fluid_player_t*);
+    DELETE_RETURNTYPE (*delete_fluid_player)(fluid_player_t*);
     void (*delete_fluid_settings)(fluid_settings_t*);
-    int (*delete_fluid_synth)(fluid_synth_t*);
+    DELETE_RETURNTYPE (*delete_fluid_synth)(fluid_synth_t*);
     int (*fluid_player_add)(fluid_player_t*, const char*);
     int (*fluid_player_add_mem)(fluid_player_t*, const void*, size_t);
     int (*fluid_player_get_status)(fluid_player_t*);
@@ -78,9 +83,9 @@
             return -1;
         }
 #endif
-        FUNCTION_LOADER(delete_fluid_player, int (*)(fluid_player_t*))
+        FUNCTION_LOADER(delete_fluid_player, DELETE_RETURNTYPE (*)(fluid_player_t*))
         FUNCTION_LOADER(delete_fluid_settings, void (*)(fluid_settings_t*))
-        FUNCTION_LOADER(delete_fluid_synth, int (*)(fluid_synth_t*))
+        FUNCTION_LOADER(delete_fluid_synth, DELETE_RETURNTYPE (*)(fluid_synth_t*))
         FUNCTION_LOADER(fluid_player_add, int (*)(fluid_player_t*, const char*))
         FUNCTION_LOADER(fluid_player_add_mem, int (*)(fluid_player_t*, const void*, size_t))
         FUNCTION_LOADER(fluid_player_get_status, int (*)(fluid_player_t*))

[Wohlstand]

Patch has been applied!
Need a test from the side...

[Wohlstand]

Tested and confirmed by reporter!