Toggle mute button

Common/KeyMap.cpp

@@ -698,6 +698,7 @@ const KeyMap_IntStrPair psp_button_names[] = {
 	{VIRTKEY_TEXTURE_DUMP, "Texture Dumping"},
 	{VIRTKEY_TEXTURE_REPLACE, "Texture Replacement"},
 	{VIRTKEY_SCREENSHOT, "Screenshot"},
+	{VIRTKEY_MUTE_TOGGLE, "Mute toggle"},
 
 	{CTRL_HOME, "Home"},
 	{CTRL_HOLD, "Hold"},

Common/KeyMap.h

@@ -57,6 +57,7 @@ enum {
 	VIRTKEY_TEXTURE_DUMP = 0x40000019,
 	VIRTKEY_TEXTURE_REPLACE = 0x4000001A,
 	VIRTKEY_SCREENSHOT = 0x4000001B,
+	VIRTKEY_MUTE_TOGGLE = 0x4000001C,
 	VIRTKEY_LAST,
 	VIRTKEY_COUNT = VIRTKEY_LAST - VIRTKEY_FIRST
 };

UI/EmuScreen.cpp

@@ -631,6 +631,9 @@ void EmuScreen::onVKeyDown(int virtualKeyCode) {
 	case VIRTKEY_RAPID_FIRE:
 		__CtrlSetRapidFire(true);
 		break;
+	case VIRTKEY_MUTE_TOGGLE:
+		g_Config.bEnableSound = !g_Config.bEnableSound;
+		break;
 	}
 }