fixed errno-related regression introduced in 2.4.35

CHANGES

@@ -4,10 +4,12 @@ Released 2.4.37 2017-05-xx
 Changes since 2.4.36:
 
 Lib/
+* fixed errno-related regression introduced in 2.4.35
 
 Tests/
 * added more checks to t_cext.py
 * renamed t_search.py to t_ldapobject.py and code-cleaning
+* added test for errno-related regression to t_ldapobject.py
 
 ----------------------------------------------------------------
 Released 2.4.36 2017-04-26
@@ -1407,4 +1409,4 @@ Released 2.0.0pre02 2002-02-01
 ----------------------------------------------------------------
 Released 1.10alpha3 2000-09-19
 
-$Id: CHANGES,v 1.433 2017/04/27 08:27:33 stroeder Exp $
+$Id: CHANGES,v 1.434 2017/04/27 08:40:10 stroeder Exp $

Lib/ldap/ldapobject.py

@@ -3,7 +3,7 @@
 
 See http://www.python-ldap.org/ for details.
 
-\$Id: ldapobject.py,v 1.161 2017/04/25 17:50:33 stroeder Exp $
+\$Id: ldapobject.py,v 1.162 2017/04/27 08:40:10 stroeder Exp $
 
 Compability:
 - Tested with Python 2.0+ but should work with Python 1.5.x
@@ -111,13 +111,8 @@ def _ldap_call(self,func,*args,**kwargs):
             diagnostic_message_success = self._l.get_option(ldap.OPT_DIAGNOSTIC_MESSAGE)
       finally:
         self._ldap_object_lock.release()
-    except LDAPError,e:
-      if 'info' not in e.args[0]:
-        try:
-          errno = e.args[0]['errno']
-        except KeyError:
-          pass
-        else:
+    except LDAPError, e:
+      if not e.args[0].has_key('info') and e.args[0].has_key('errno'):
           e.args[0]['info'] = strerror(e.args[0]['errno'])
       if __debug__ and self._trace_level>=2:
         self._trace_file.write('=> LDAPError - %s: %s\n' % (e.__class__.__name__,str(e)))