[1.1.X] Fixed #10015 -- PostgreSQL 8.3+ no longer barfs when passing an...

[1.1.X] Fixed #10015 -- PostgreSQL 8.3+ no longer barfs when passing an integer as a filter() value for a CharField? or TextField?. Thanks, carljm 

Backport of r12150 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@12263 bcc190cf-cafb-0310-a4f2-bffc1f526a37