fix errors reported by gcc.
fix errors reported by gcc.

we must always use the return of eina_list_{append,prepend...}



git-svn-id: 02aad79badda6dfe9dc72877135550b4bc575585@38481 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33

OpenInkpot-archive/ecore,OpenInkpot-archive/ecore,OpenInkpot-archive/ecore