[librsvg/librsvg-2.44: 6/7] Merge branch 'cve-2019-20446-2.44' into librsvg-2.44

[Federico Mena Quintero <federico src gnome org>]

commit fc1fb6cf19561d448f03e3f8591ad699fc11965b
Merge: 696e4a6b 5edea8ca
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Feb 26 19:07:39 2020 -0600

    Merge branch 'cve-2019-20446-2.44' into librsvg-2.44

 Makefile.am                                        |   1 +
 librsvg/rsvg-load.c                                |  20 ++++
 rsvg_internals/src/drawing_ctx.rs                  |  53 +++++----
 rsvg_internals/src/error.rs                        |   1 +
 rsvg_internals/src/lib.rs                          |   1 +
 rsvg_internals/src/limits.rs                       |  11 ++
 rsvg_internals/src/structure.rs                    |  19 +--
 tests/errors.c                                     |  46 +++++++-
 tests/fixtures/errors/308-doubly-recursive-use.svg |  13 +++
 tests/fixtures/errors/308-recursive-use.svg        |   9 ++
 tests/fixtures/errors/308-use-self-ref.svg         |   7 ++
 .../fixtures/errors/515-pattern-billion-laughs.svg | 130 +++++++++++++++++++++
 tests/fixtures/errors/515-too-many-elements.svgz   | Bin 0 -> 40811 bytes
 13 files changed, 273 insertions(+), 38 deletions(-)
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