[1.2.X] Fixed #13773 -- Passed in the current connection in a call to…

… db_type(). Thanks to Suor for the report and patch.

Backport of r13451 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13453 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/postgresql/creation.py

@@ -63,7 +63,7 @@ def get_index_sql(index_name, opclass=''):
             # a second index that specifies their operator class, which is
             # needed when performing correct LIKE queries outside the
             # C locale. See #12234.
-            db_type = f.db_type()
+            db_type = f.db_type(connection=self.connection)
             if db_type.startswith('varchar'):
                 output.append(get_index_sql('%s_%s_like' % (db_table, f.column),
                                             ' varchar_pattern_ops'))