bpo-42114: ctypes documentation: fix winmode parameter default value (GH-29976) (GH-30037)

Signed-off-by: Louis Sautier <[email protected]>
(cherry picked from commit c1051e0)

Co-authored-by: Louis Sautier <[email protected]>

Author: miss-islington

Doc/library/ctypes.rst

@@ -1320,7 +1320,7 @@ There are several ways to load shared libraries into the Python process.  One
 way is to instantiate one of the following classes:
 
 
-.. class:: CDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False, winmode=0)
+.. class:: CDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False, winmode=None)
 
    Instances of this class represent loaded shared libraries. Functions in these
    libraries use the standard C calling convention, and are assumed to return
@@ -1342,7 +1342,7 @@ way is to instantiate one of the following classes:
     -- A tool to find DLL dependents.
 
 
-.. class:: OleDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False, winmode=0)
+.. class:: OleDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False, winmode=None)
 
    Windows only: Instances of this class represent loaded shared libraries,
    functions in these libraries use the ``stdcall`` calling convention, and are
@@ -1355,7 +1355,7 @@ way is to instantiate one of the following classes:
       :exc:`WindowsError` used to be raised.
 
 
-.. class:: WinDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False, winmode=0)
+.. class:: WinDLL(name, mode=DEFAULT_MODE, handle=None, use_errno=False, use_last_error=False, winmode=None)
 
    Windows only: Instances of this class represent loaded shared libraries,
    functions in these libraries use the ``stdcall`` calling convention, and are