fix non static volume

sources/Component/Music/MusicComponent.cpp

@@ -12,6 +12,7 @@ namespace BBM
 		  _musicPath(musicPath),
 		  _music(RAY::Audio::Music(musicPath))
 	{
+		this->volume = 1;
 	}
 
 	WAL::Component *MusicComponent::clone(WAL::Entity &entity) const

sources/Component/Music/MusicComponent.hpp

@@ -44,7 +44,7 @@ namespace BBM
 		//! @brief A Music component is not assignable
 		MusicComponent &operator=(const MusicComponent &) = delete;
 		//! @brief Volume of the muisc
-		float volume = 1;
+		static float volume;
 	private:
 		//! @brief music of this entity
 		RAY::Audio::Music _music;

sources/Component/Sound/SoundComponent.cpp

@@ -14,6 +14,7 @@ const std::map<SoundComponent::soundIndex, std::string> &soundPath)
 		  _soundIndex(IDLE),
 		  _soundPath(soundPath)
 	{
+		this->volume = 1;
 		for (int i = 0; i <= DEATH; i++) {
 			if (soundPath.at(static_cast<soundIndex>(i)).empty()) {
 				this->_isLoad[static_cast<soundIndex>(i)] = false;

sources/Component/Sound/SoundComponent.hpp

@@ -61,7 +61,7 @@ namespace BBM
 		//! @brief A Sound component is not assignable
 		SoundComponent &operator=(const SoundComponent &) = delete;
 		//! @brief Volume of the sounds
-		float volume = 1;
+		static float volume;
 
 	private:
 		//! @brief Sounds of this entity