login: silence warning about missing initializer for slots

[5/10] Compiling C object src/systemd/login.cpython-313-x86_64-linux-gnu.so.p/login.c.o
../src/systemd/login.c:321:1: warning: missing initializer for field ‘m_slots’ of ‘struct PyModuleDef’ [-Wmissing-field-initializers]
  321 | };
      | ^
In file included from /usr/include/python3.13/Python.h:95,
                 from ../src/systemd/login.c:6:
/usr/include/python3.13/moduleobject.h:113:21: note: ‘m_slots’ declared here
  113 |   PyModuleDef_Slot *m_slots;
      |                     ^~~~~~~

Author: keszybz

src/systemd/login.c

@@ -314,10 +314,11 @@ static PyTypeObject MonitorType = {
 
 static struct PyModuleDef module = {
         PyModuleDef_HEAD_INIT,
-        "login", /* name of module */
-        module__doc__, /* module documentation, may be NULL */
-        -1, /* size of per-interpreter state of the module */
-        methods
+        .m_name = "login",      /* name of module */
+        .m_doc = module__doc__, /* module documentation, may be NULL */
+        .m_size = -1,           /* size of per-interpreter state of the module */
+        .m_methods = methods,
+        .m_slots = NULL,
 };
 
 DISABLE_WARNING_MISSING_PROTOTYPES;