Update of ACLs generate invalid PostgreSQL INSERT statements

I'm fairly new to things Drupal so apologies in advance if this is wasting anyone's time.

I was exercising the ACL functions with the forum_access module and continuously received SQL syntax errors. The culprit appears to be in node_access_write_grants() in the block starting at line 2868 where the grant inserts are built up. The finished statement ends up taking the form:

INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) VALUES (a1, a2, a3, a4, a5), (b1, b2, b3, b4, b5)

as opposed to the correct (in SQL anyway) form:

INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) VALUES (a1, a2, a3, a4, a5);
INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) VALUES (b1, b2, b3, b4, b5);

The fix is obvious and instant. Hope this is useful.