usb mouse: Return the result of send_report().

Signed-off-by: Angus Gratton <angus@redyak.com.au>

Author: projectgus

micropython/usb/usb-device-mouse/usb/device/mouse.py

@@ -38,26 +38,26 @@ def send_report(self, dx=0, dy=0):
         # same buffer, before the previous one has completed.
         report = struct.pack("Bbb", b, dx, dy)
 
-        super().send_report(report)
+        return super().send_report(report)
 
     def click_left(self, down=True):
         self._l = down
-        self.send_report()
+        return self.send_report()
 
     def click_middle(self, down=True):
         self._m = down
-        self.send_report()
+        return self.send_report()
 
     def click_right(self, down=True):
         self._r = down
-        self.send_report()
+        return self.send_report()
 
     def move_by(self, dx, dy):
         if not -127 <= dx <= 127:
             raise ValueError("dx")
         if not -127 <= dy <= 127:
             raise ValueError("dy")
-        self.send_report(dx, dy)
+        return self.send_report(dx, dy)
 
 
 # Basic 3-button mouse HID Report Descriptor.