obs-scripting: Add missing function import for PyType_IsSubtype

deps/obs-scripting/obs-scripting-python-import.c

@@ -118,6 +118,7 @@ bool import_python(const char *python_path, python_version_t *python_version)
 
 	IMPORT_FUNC(PyType_Ready);
 	IMPORT_FUNC(PyType_Modified);
+	IMPORT_FUNC(PyType_IsSubtype);
 	IMPORT_FUNC(PyObject_GenericGetAttr);
 	IMPORT_FUNC(PyObject_IsTrue);
 	IMPORT_FUNC(Py_DecRef);