Duplicate assignment INSERT warning

... cut-and-pasted from our email thread the other day ...

After hitting Submit when creating a new Assignment, you'll get into assignment_insert via node_invoke($node, 'insert') via node_save()... Then, you'll get into gradebookapi_nodeapi($node, 'insert', ...) which will end up calling gradebookapi_assignment_insert() all over again.

so i think that you can get rid of these:

function assignment_load($node) {
 return gradebookapi_assignment_load($node);
}
function assignment_insert($node) {
 gradebookapi_assignment_insert($node);
}
function assignment_update($node) {
 gradebookapi_assignment_update($node);
}
function assignment_delete($node) {
 gradebookapi_assignment_delete($node);
}

...because an assignment node is really just a plain old node with nothing added other than the stuff that the gradebookapi adds... and the gradebookapi can add that stuff to any node type that can be "an assignment" via hook_nodeapi.