Chris Shoemaker's patch to silence gtk errors in

[Derek Atkins]

Log Message:
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Chris Shoemaker's patch to silence gtk errors in dialog-budget-category.c.

	* 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().

Tags:
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gnucash-gnome2-dev

Modified Files:
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    gnucash:
        ChangeLog
    gnucash/src/gnome:
        dialog-budget-category.c