evas: Restore flag pre_render_done in render_mapped

evas: Restore flag pre_render_done in render_mapped

Author:     Jean-Philippe Andre <jp.andre@samsung.com>
AuthorDate: Thu Jul 20 14:35:48 2017 +0900
Commit:     Jean-Philippe Andre <jp.andre@samsung.com>
CommitDate: Thu Jul 20 15:17:36 2017 +0900

    evas: Restore flag pre_render_done in render_mapped

    Some objects don't go through render_pre (unchanged, child
    of mapped parents), even though they will go through
    evas_render_mapped. Those were marked as pre_render_done
    inside evas_render_mapped since it seemed to fix some issues
    a long time ago.

    Unfortunately, if those objects are changed their flag may
    not be reset to false, which means they never go through
    render_pre, leading to render issues.

    I believe simply restoring the value of the pre_render_done
    flag should be good enough. I don't know why it is set to
    true inside evas_render_mapped but I also don't want to find
    out :)

    See 9ac13e4aec83ea6dadfa62e4253b1db4ffe167e8 (old)
    See 87e5e70a9d888ce93ed807bb0d39d1738241ad9b (older)

    Patch made with @jiin.moon

Change-Id: I18cba0e979bc7fe50952ff33b01b9bc4160087a5