fix UBSan failures for pysqlite_PrepareProtocol

Author: picnixz

Modules/_sqlite/prepare_protocol.c

@@ -24,8 +24,7 @@
 #include "prepare_protocol.h"
 
 static int
-pysqlite_prepare_protocol_init(pysqlite_PrepareProtocol *self, PyObject *args,
-                               PyObject *kwargs)
+pysqlite_prepare_protocol_init(PyObject *self, PyObject *args, PyObject *kwargs)
 {
     return 0;
 }
@@ -38,7 +37,7 @@ pysqlite_prepare_protocol_traverse(PyObject *self, visitproc visit, void *arg)
 }
 
 static void
-pysqlite_prepare_protocol_dealloc(pysqlite_PrepareProtocol *self)
+pysqlite_prepare_protocol_dealloc(PyObject *self)
 {
     PyTypeObject *tp = Py_TYPE(self);
     PyObject_GC_UnTrack(self);

Modules/_sqlite/prepare_protocol.h

@@ -30,6 +30,8 @@ typedef struct
     PyObject_HEAD
 } pysqlite_PrepareProtocol;
 
+#define _pysqlite_PrepareProtocol_CAST(op)  ((pysqlite_PrepareProtocol *)(op))
+
 int pysqlite_prepare_protocol_setup_types(PyObject *module);
 
 #endif