[PATCH] Silence gtk errors in dialog-budget-category.c

[Chris Shoemaker]

  * we don't need to get our own account TreeModel and set it to our
new account TreeView, because gnc_tree_view_account_new gives us a
TreeView with the global account TreeModel already set.  Plus, it
already has the right TreeModelSort interface, which we are counting
on.
  * check for NULL before trying to gtk_entry_set_text().