[librsvg: 2/2] Merge branch 'ub-enums' into 'master'

[Federico Mena Quintero <federico src gnome org>]

commit 196be8e1edc6ff58099fe23066539847570b84cc
Merge: 172c7467 ff9d7f19
Author: Federico Mena Quintero <federico mena gmail com>
Date:   Thu Dec 6 16:14:05 2018 +0000

    Merge branch 'ub-enums' into 'master'
    
    (391): Avoid undefined behavior casting opaque pointers to empty enums
    
    Closes #391
    
    See merge request GNOME/librsvg!161

 rsvg_internals/src/drawing_ctx.rs |  5 ++++-
 rsvg_internals/src/handle.rs      | 10 ++++++++--
 rsvg_internals/src/xml.rs         |  5 ++++-
 3 files changed, 16 insertions(+), 4 deletions(-)
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