Codechange: Use std::string in the driver and blitter selection code.

src/music/fluidsynth.cpp

@@ -50,7 +50,7 @@ static void RenderMusicStream(int16 *buffer, size_t samples)
 	fluid_synth_write_s16(_midi.synth, samples, buffer, 0, 2, buffer, 1, 2);
 }
 
-const char *MusicDriver_FluidSynth::Start(const char * const *param)
+const char *MusicDriver_FluidSynth::Start(const StringList &param)
 {
 	std::lock_guard<std::mutex> lock{ _midi.synth_mutex };