Prevent out-of-bounds array access

Fixes https://github.com/itgmania/itgmania/issues/27

src/arch/InputHandler/InputHandler_MacOSX_HID.mm

@@ -450,7 +450,7 @@ wchar_t InputHandler_MacOSX_HID::DeviceButtonToChar( DeviceButton button, bool b
 	{
 		CGEventRef event = CGEventCreate(nullptr);
 		CGEventFlags mods = CGEventGetFlags(event);
-        CFRelease(event);
+		CFRelease(event);
 		UInt32 nModifiers = bUseCurrentKeyModifiers ? (UInt32)mods : 0;
 		wchar_t sCharCode = KeyCodeToChar( iMacVirtualKey, nModifiers );
 		if( sCharCode != 0 )

src/archutils/Darwin/KeyboardDevice.cpp

@@ -482,7 +482,14 @@ bool KeyboardDevice::DeviceButtonToMacVirtualKey( DeviceButton button, UInt8 &iM
 		}
 		bInited = true;
 	}
-	iMacVKOut = g_iDeviceButtonToMacVirtualKey[button];
+	if (button < sizeof(g_iDeviceButtonToMacVirtualKey))
+	{
+		iMacVKOut = g_iDeviceButtonToMacVirtualKey[button];
+	}
+	else
+	{
+		iMacVKOut = 0xFF;
+	}
 	return iMacVKOut != 0xFF;
 }