Mouse: Fix ctypes definition to work with other packages

[CristiFati]

Same thing as [GitHub]: kivy/kivy - SetWindowLongPtrW ctypes prototype bug.

Stacktrace (partial):

...
   File "e:\Work\Dev\VEnvs\py_064_03.07.03_test0\lib\site-packages\kivy\input\providers\wm_touch.py", line 72, in update
     windll.user32.GetClientRect(self.hwnd, byref(c_rect))
 ctypes.ArgumentError: argument 2: <class 'TypeError'>: expected LP_RECT instance instead of pointer to RECT

A complete history can be found at [GitHub]: pywinauto/pywinauto - ctypes.ArgumentError @ click_input:

• This error was encountered in the past, and was fixed (on the other side) by switching to PyWin32
• Then it was switched back, and the error reappears

The investigation and example can be found at [SO]: ctypes.ArgumentError when using kivy with pywinauto (@CristiFati's answer).

This PR works in conjunction with [GitHub]: pywinauto/pywinauto - ctypes adaptations in order to work with other packages (changes from both PRs are required for the error to be fixed - stating the obvious: they won't make any difference if yet another module is in the same situation).

[matham]

Seems ok, but I didn't test.