gdb_assert will never be triggered

[Joel Brobecker]

Hello,

While looking at frame.c:get_prev_frame(), I saw the following:

  if (this_frame == NULL)
    {
      [large comment snip'ed]
      frame_debug_got_null_frame (gdb_stdlog, this_frame, "this_frame NULL");
      return current_frame;
    }

  /* There is always a frame.  If this assertion fails, suspect that
     something should be calling get_selected_frame() or
     get_current_frame().  */
  gdb_assert (this_frame != NULL);

It looks like the assertion will always be true, due to the block
above... Do we want to keep this gdb_assert() call nonetheless?

-- 
Joel