evas-wayland-egl: Free Outbuf if gl_generic_init fails

If we fail to init gl_generic then we should cleanup properly and free
the recently created Outbuf.

@fix

Signed-off-by: Chris Michael <cp.michael@samsung.com>

src/modules/evas/engines/wayland_egl/evas_engine.c

@@ -637,7 +637,7 @@ eng_setup(Evas *evas, void *info)
                                                 &evgl_funcs, 
                                                 epd->output.w, epd->output.h))
           {
-             /* TODO: free Outbuf */
+             eng_window_free(ob);
              goto ob_err;
           }