Fixed Low Speed USB devices broken when using the library HID Class driver (thanks to Michael).

LUFA/DoxygenPages/ChangeLog.txt

@@ -17,6 +17,8 @@
   *   - Updated the BUILD build system module to produce binary BIN files in addition to Intel HEX files
   *
   *  <b>Fixed:</b>
+  *  - Core:
+  *   - Fixed Low Speed USB devices broken when using the library HID Class driver (thanks to Michael)
   *  - Library Applications:
   *   - Added handler for SCSI_CMD_START_STOP_UNIT in demos using the Mass Storage class, to prevent ejection errors on *nix systems due to an
   *     unknown SCSI command

LUFA/Drivers/USB/Class/Device/HIDClassDevice.c

@@ -155,7 +155,14 @@ void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
 	  return;
 
 	if (HIDInterfaceInfo->State.PrevFrameNum == USB_Device_GetFrameNumber())
+	{
+		#if defined(USB_DEVICE_OPT_LOWSPEED)
+		if (!(USB_Options & USB_DEVICE_OPT_LOWSPEED))
+		  return;
+		#else
 		return;
+		#endif
+	}
 
 	Endpoint_SelectEndpoint(HIDInterfaceInfo->Config.ReportINEndpoint.Address);