[librsvg: 8/8] Merge branch 'c-api-assertions' into 'master'

[Federico Mena Quintero <federico src gnome org>]

commit d73a40c5232cd67947d8822b4686859e93019dc4
Merge: dad5ce86 f393b987
Author: Federico Mena Quintero <federico mena gmail com>
Date:   Thu Apr 9 05:21:35 2020 +0000

    Merge branch 'c-api-assertions' into 'master'
    
    C api assertions
    
    See merge request GNOME/librsvg!321

 Makefile.am             |   1 +
 librsvg/c_api.rs        | 357 ++++++++++++++++++++++++++++++++----------------
 librsvg/lib.rs          |   8 +-
 librsvg/messages.rs     | 115 ++++++++++++++++
 librsvg/pixbuf_utils.rs |  49 +++++--
 librsvg/rsvg-handle.c   |  99 +-------------
 librsvg/rsvg-pixbuf.c   |  30 +---
 tests/api.c             |  53 +++++++
 8 files changed, 465 insertions(+), 247 deletions(-)
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