gustavo's patch on free an empty/unused evas.

SVN revision: 29777

legacy/evas/src/lib/engines/common/evas_draw_main.c

@@ -95,6 +95,8 @@ evas_common_draw_context_new(void)
 EAPI void
 evas_common_draw_context_free(RGBA_Draw_Context *dc)
 {
+   if (!dc) return;
+
    evas_common_draw_context_apply_clean_cutouts(&dc->cutout);
    free(dc);
 }

legacy/evas/src/modules/engines/software_x11/evas_engine.c

@@ -253,6 +253,8 @@ eng_output_free(void *data)
 {
    Render_Engine *re;
 
+   if (!data) return;
+
    re = (Render_Engine *)data;
    evas_software_x11_outbuf_free(re->ob);
    evas_common_tilebuf_free(re->tb);