ecore_wayland: Check for null inputs

Summary:
The other functions in this module check inputs; this one should as
well.

Reviewers: zmike

Subscribers: cedric

Differential Revision: https://phab.enlightenment.org/D2210

src/lib/ecore_wayland/ecore_wl_input.c

@@ -250,6 +250,8 @@ _ecore_wl_input_cursor_update(void *data)
    Ecore_Wl_Input *input = data;
    unsigned int delay;
 
+   if ((!input) || (!input->cursor)) return EINA_FALSE;
+
    cursor_image = input->cursor->images[input->cursor_current_index];
    if (!cursor_image) return ECORE_CALLBACK_RENEW;