Fixed #32840 -- Optimized Field.get_col().
Fixed #32840 -- Optimized Field.get_col().

get_col() used "self" as "output_field" when it was not given, and
unnecessarily compared "self" to "self".

Co-authored-by: Chris Jerdonek <3ec5ae488bc7ef4c4c2ea303a4cf6277dd8d4897@gmail.com>
Co-authored-by: Mariusz Felisiak <c2eaa21cd08f04025a849861228fb3cfa2aa6078@gmail.com>
felixxm/django,dsanders11/django,felixxm/django,monetate/django,felixxm/django,pauloxnet/django,atul-bhouraskar/django,manhhomienbienthuy/django,dsanders11/django,apollo13/django,manhhomienbienthuy/django,pauloxnet/django,django/django,apollo13/django,ghickman/django,solarissmoke/django,atul-bhouraskar/django,solarissmoke/django,pauloxnet/django,blighj/django,dsanders11/django,manhhomienbienthuy/django,pauloxnet/django,monetate/django,auvipy/django,monetate/django,takis/django,ghickman/django,manhhomienbienthuy/django,takis/django,solarissmoke/django,blighj/django,auvipy/django,django/django,auvipy/django,felixxm/django,rsalmaso/django,django/django,rsalmaso/django,ghickman/django,rsalmaso/django,shaib/django,rsalmaso/django,MarkusH/django,shaib/django,atul-bhouraskar/django,shaib/django,blighj/django,MarkusH/django,takis/django,ghickman/django,MarkusH/django,apollo13/django,MarkusH/django,takis/django,django/django,monetate/django,blighj/django,apollo13/django,shaib/django,dsanders11/django,solarissmoke/django,auvipy/django,atul-bhouraskar/django