(ITS#5762) ldap_create_page_control might return wrong error code

Full_Name: Ralf Haferkamp Version: RE24, Head OS: Linux URL: ftp://ftp.openldap.org/incoming/ Submission from: (NULL) (89.166.241.0) Submitted by: ralf

ldap_create_page_control_value doesn't reset ld_errno to LDAP_SUCCESS therefor it will return the result code of the previous LDAP API call instead of LDAP_SUCCESS. (If the previous LDAP API call set ld_errno do something different than LDAP_SUCCESS).

The same seems to be true for the corresponding function in at least: sortctrl.c, vlvctrl.c and stctrl.c

Fix will follow.