Fixed some memory allocation/freeing bugs

contrib/ldapc++/src/LDAPAddRequest.cpp

contrib/ldapc++/src/LDAPAsynConnection.cpp

contrib/ldapc++/src/LDAPAttribute.cpp

contrib/ldapc++/src/LDAPAttributeList.cpp

contrib/ldapc++/src/LDAPBindRequest.cpp

contrib/ldapc++/src/LDAPCompareRequest.cpp

contrib/ldapc++/src/LDAPControl.cpp

contrib/ldapc++/src/LDAPControl.h

contrib/ldapc++/src/LDAPControlSet.cpp

contrib/ldapc++/src/LDAPControlSet.h

contrib/ldapc++/src/LDAPDeleteRequest.cpp

contrib/ldapc++/src/LDAPEntry.cpp

contrib/ldapc++/src/LDAPExtRequest.cpp

contrib/ldapc++/src/LDAPMessageQueue.cpp

contrib/ldapc++/src/LDAPModDNRequest.cpp

contrib/ldapc++/src/LDAPModList.cpp

contrib/ldapc++/src/LDAPModification.cpp

contrib/ldapc++/src/LDAPModifyRequest.cpp

contrib/ldapc++/src/LDAPResult.cpp

contrib/ldapc++/src/LDAPSearchRequest.cpp