Merge pull request 2ndQuadrant#7 from jhm713/fix_updates_with_excluded_cols

updates were logging excluded_cols

Author: ringerc

audit.sql

@@ -122,7 +122,7 @@ BEGIN
     END IF;
 
     IF (TG_OP = 'UPDATE' AND TG_LEVEL = 'ROW') THEN
-        audit_row.row_data = hstore(OLD.*);
+        audit_row.row_data = hstore(OLD.*) - excluded_cols;
         audit_row.changed_fields =  (hstore(NEW.*) - audit_row.row_data) - excluded_cols;
         IF audit_row.changed_fields = hstore('') THEN
             -- All changed fields are ignored. Skip this update.