cli: Use CWD as DLL search path on Windows as default.

openage/__main__.py

@@ -1,4 +1,4 @@
-# Copyright 2015-2023 the openage authors. See copying.md for legal info.
+# Copyright 2015-2024 the openage authors. See copying.md for legal info.
 #
 # pylint: disable=too-many-statements
 """
@@ -44,12 +44,14 @@ def close_windows_dll_path_handles(dll_path_handles):
         for handle in dll_path_handles:
             handle.close()
 
-    if sys.platform == 'win32' and dll_paths is not None:
-        import atexit
-        win_dll_path_handles = []
-        for addtional_path in dll_paths:
-            win_dll_path_handles.append(os.add_dll_directory(addtional_path))
-        atexit.register(close_windows_dll_path_handles, win_dll_path_handles)
+    if sys.platform != 'win32' or dll_paths is None:
+        return
+
+    import atexit
+    win_dll_path_handles = []
+    for addtional_path in dll_paths:
+        win_dll_path_handles.append(os.add_dll_directory(addtional_path))
+    atexit.register(close_windows_dll_path_handles, win_dll_path_handles)
 
 
 def main(argv=None):
@@ -62,6 +64,7 @@ def main(argv=None):
     if sys.platform == 'win32':
         cli.add_argument(
             "--add-dll-search-path", action='append', dest='dll_paths',
+            default=[os.getcwd()],
             help="(Windows only) provide additional DLL search path")
 
     cli.add_argument("--version", "-V", action='store_true', dest='print_version',