Fix: Convert C integer to Python objects.

Author: fangerer

graalpython/com.oracle.graal.python.cext/src/modsupport.c

@@ -265,7 +265,7 @@ PyObject* _Py_BuildValue_SizeT(const char *format, ...) {
             APPEND_VALUE(list, (Py_ssize_t)ARG);
             break;
         case 'i':
-            APPEND_VALUE(list, (int)ARG);
+            APPEND_VALUE(list, PyLong_FromLong((int)ARG));
             break;
         case 's':
             if (ARG == NULL) {