wl text input - handle out of mem and free half done struct

stgruct we alloced is not freed if a child element setup fails...
fixes a technical leak. coverity found it.

fix CID 1403931

src/modules/wl_text_input/e_mod_main.c

@@ -793,6 +793,7 @@ _e_text_input_manager_cb_text_input_create(struct wl_client *client, struct wl_r
                                              1, id);
    if (!text_input->resource)
      {
+        free(text_input);
         wl_client_post_no_memory(client);
         ERR("could not create wl_resource for text input");
         return;