mixer/Internal: add "noexcept"

src/mixer/plugins/AlsaMixerPlugin.cxx

@@ -95,7 +95,7 @@ public:
 
 	/* virtual methods from class Mixer */
 	void Open() override;
-	void Close() override;
+	void Close() noexcept override;
 	int GetVolume() override;
 	void SetVolume(unsigned volume) override;
 };
@@ -252,7 +252,7 @@ AlsaMixer::Open()
 }
 
 void
-AlsaMixer::Close()
+AlsaMixer::Close() noexcept
 {
 	assert(handle != nullptr);
 

src/mixer/plugins/HaikuMixerPlugin.cxx

@@ -40,7 +40,7 @@ public:
 	virtual void Open() override {
 	}
 
-	virtual void Close() override {
+	void Close() noexcept override {
 	}
 
 	virtual int GetVolume() override;

src/mixer/plugins/NullMixerPlugin.cxx

@@ -37,7 +37,7 @@ public:
 	void Open() override {
 	}
 
-	void Close() override {
+	void Close() noexcept override {
 	}
 
 	int GetVolume() override {

src/mixer/plugins/OssMixerPlugin.cxx

@@ -59,7 +59,7 @@ public:
 
 	/* virtual methods from class Mixer */
 	void Open() override;
-	void Close() override;
+	void Close() noexcept override;
 	int GetVolume() override;
 	void SetVolume(unsigned volume) override;
 };
@@ -105,7 +105,7 @@ oss_mixer_init(gcc_unused EventLoop &event_loop, gcc_unused AudioOutput &ao,
 }
 
 void
-OssMixer::Close()
+OssMixer::Close() noexcept
 {
 	assert(device_fd >= 0);
 

src/mixer/plugins/PulseMixerPlugin.cxx

@@ -59,7 +59,7 @@ public:
 	void Open() override {
 	}
 
-	void Close() override {
+	void Close() noexcept override {
 	}
 
 	int GetVolume() override;

src/mixer/plugins/RoarMixerPlugin.cxx

@@ -37,7 +37,7 @@ public:
 	void Open() override {
 	}
 
-	virtual void Close() override {
+	void Close() noexcept override {
 	}
 
 	int GetVolume() override;

src/mixer/plugins/SoftwareMixerPlugin.cxx

@@ -50,7 +50,7 @@ public:
 	void Open() override {
 	}
 
-	virtual void Close() override {
+	void Close() noexcept override {
 	}
 
 	int GetVolume() override {

src/mixer/plugins/WinmmMixerPlugin.cxx

@@ -43,7 +43,7 @@ public:
 	void Open() override {
 	}
 
-	void Close() override {
+	void Close() noexcept override {
 	}
 
 	int GetVolume() override;