Fixed #12458 -- no longer use try/except/finally syntax in PostGIS and...

Fixed #12458 -- no longer use try/except/finally syntax in PostGIS and SpatiaLite backends as it's incompatible with Python 2.4.  Thanks, knutin, for bug report and patch.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@12026 bcc190cf-cafb-0310-a4f2-bffc1f526a37