st: return Sargan test probability in xtabond

[Kai Kirchesch <kirchesch@hwwa.de>]

After xtabond, the command "ereturn list" only returns among others the 
Sargan test statistic, but not the probability. Is there a way to obtain 
this probability as a e(.) result for further processing? What do I have 
to include in the xtabond.ado?
Thanks in advance,
Kai

*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/