uninitialized variable in parse-datetime.y

[Bruno Haible]

Found by Coverity (1449024):
In lib/parse-datetime.y
  line 1822:   parser_control pc;
  line 1826:     if (pc.parse_datetime_debug)
  line 1850:   pc.parse_datetime_debug = ...;

In line 1826 it is uninitialized.

Bruno