added 'except NULL' for get_c_string_buf_and_size in util.pxd(bug without)

Author: anmyachev

pandas/_libs/tslibs/util.pxd

@@ -258,8 +258,8 @@ cdef inline bint is_nan(object val):
     return is_complex_object(val) and val != val
 
 
-cdef inline const char* get_c_string_buf_and_size(object py_string,
-                                                  Py_ssize_t *length):
+cdef inline const char* get_c_string_buf_and_size(
+    object py_string, Py_ssize_t *length) except NULL:
     """
     Extract internal char* buffer of unicode or bytes object `py_string` with
     getting length of this internal buffer saved in `length`.