fluidsynth: Don't use deprecated function

fluid_synth_set_sample_rate has been deprecated started from 2.1.0

modules/codec/fluidsynth.c

@@ -110,6 +110,8 @@ static int Open (vlc_object_t *p_this)
         return VLC_ENOMEM;
 
     p_sys->settings = new_fluid_settings ();
+    fluid_settings_setnum(p_sys->settings, "synth.sample-rate",
+                          p_dec->fmt_out.audio.i_rate);
     p_sys->synth = new_fluid_synth (p_sys->settings);
     p_sys->soundfont = -1;
 
@@ -170,7 +172,6 @@ static int Open (vlc_object_t *p_this)
 
     p_dec->fmt_out.audio.i_rate =
         var_InheritInteger (p_this, "synth-sample-rate");;
-    fluid_synth_set_sample_rate (p_sys->synth, p_dec->fmt_out.audio.i_rate);
     p_dec->fmt_out.audio.i_channels = 2;
     p_dec->fmt_out.audio.i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
     p_dec->fmt_out.i_codec = VLC_CODEC_FL32;