update AudioManager: added volume to event

Author: Popochounet

include/GEngine/libdev/systems/driver/output/AudioManager.hpp

@@ -62,6 +62,7 @@ class AudioManager
                         geg::component::network::NetSend());
         else {
             getMusicComponent().musicId = getMusicIdByPath(e.path);
+            getMusicComponent().volume = e.volume;
             for (auto [e, _unused, netSend] : gengine::Zip(musics, netSends)) {
                 netSend.update();
                 break;

include/GEngine/libdev/systems/events/driver/output/Sound.hpp

@@ -40,10 +40,12 @@ struct SoundPlayed : public Event {
 };
 
 struct Music : public Event {
-    Music(const std::string &path)
-        : path(path) {
+    Music(const std::string &path, float volume = 1.f)
+        : path(path)
+        , volume(volume) {
     }
 
     const std::string path;
+    const float volume;
 };
 } // namespace gengine::system::event::driver::output