evas/engine: fix a potentional error of null deref

Summary: this is a patch to fix a potentional error by null dereferencing.

Reviewers: jsuya, bu5hm4n, Hermet

Reviewed By: jsuya, bu5hm4n

Subscribers: bu5hm4n, cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D12091

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

@@ -243,6 +243,8 @@ eng_image_native_set(void *engine EINA_UNUSED, void *image, void *native)
                                                NULL, 1,
                                                EVAS_COLORSPACE_ARGB8888);
 
+   EINA_SAFETY_ON_NULL_RETURN_VAL(im2, im);
+
    if (im->native.data)
       {
          if (im->native.func.free)