[python-ldap] Reference leaks in error-handling paths

[Petr Spacek]

Hello,

static analysis tool gcc-python-plugin detected some bugs within the C Python 
extension module.

Full report from analyzer is at:
https://fedorapeople.org/~dmalcolm/gcc-python-plugin/2012-04-04/python-ldap-2.4.6-2.fc17/

Within the category "Reference leaks" the 6 issues reported are all memory 
leaks in error-handling paths. 5 out of them relate to Py_BuildValue:
http://gcc-python-plugin.readthedocs.org/en/latest/cpychecker.html#reference-leak-in-py-buildvalue

The other, in
   File:	Modules/LDAPObject.c
   Function:	interaction
   Error:	ob_refcnt of '*result' is 1 too high
is a missing Py_DECREF().

Detailed discussion about some other potential bugs is at:
https://bugzilla.redhat.com/show_bug.cgi?id=809943

Credit for uncovering these problems belongs to Dave Malcolm 
<dmalcolm at redhat.com>.

I'm not able to send you patch now so I'm sending the bug report to let you 
know about the problem.

Have a nice day!

-- 
Petr Spacek  @  Red Hat