Blender Git Loki

Tweak error message when external image editor launching fails.

Include idea that Blender may fail to launch it even if path is correct,
in some cases (dear Windows...).

Based on idea from @lijenstina and @blendify (D2349), thanks.

Also apply similar fixes to .keyframe_delete()

- T49816

Fix T49816: Keyframing NLA Strip influence from Python set keyframes in the wrong place

Fix T50184: Grease Pencil Layer synchronization between Dope Sheet and Properties panel

Fix T49479: Freestyle inconsistent line drawing with large geometry dimension.

Ray-plane intersection routine GeomUtils::intersectRayPlane() was used with an
unnormalized direction vector as input.

3D View roll & orbit were scaling view-quat length

Over time roll and orbit would scale the quaternion
which is documented as unit length.

In practice any errors would be subtle,
but better normalize as other operators do.

Comments: mul_project_m4_v3_zfac

Fix T50240: Rendering crashes when synced to JACK Transport

Disabling synchronization while rendering.
Using G.is_rendering as suggested by bastien. ;-)

Fix T50305: Blender truncates a long multibyte character object's name to an invalid utf-8 string.

Add logic in RNA to ensure we pass valid utf8 string to BKE ID new functions...

Correct bad cast, unused var warning

Comments: hints for perspective functions

Note which GL functions these are equivalent to.

[MSVC] Fix test for C++11 support for vc2015/2017 based on D2432 by Ulysse Martin (youle)

Merge remote-tracking branch 'origin/master' into blender2.8

Fix (unreported) crash in 'Match movie length operator' in case of lost video texture file

Readfile: Resurrect do_versions_after_liblink.

Basic idea is to store fileversion in Library datablock, and split again
Main by libraries after lib linking, do_versions_after_liblink on
those separated Mains, and merge again.

This allows to still have correct versions for each data-block in that
second do_versions step.

Note that this is not used currently in master (might be soon, though),
but is needed for 2.8 work.

Fix (unreported) `--threads` option no more respected by main task scheduler.

Main scheduler would be created way before `-t` argument would be
parsed, since it was on forth pass! Moved it to first pass of argparse,
that kind of stuff should be initialized asap on startup.

Fix wrong return type in blenderplayer stubs

Fix strict compiler warning in generated C++ RNA

OpensSubdiv: Cleanup, unused argument

Libmv: Fix missing virtual destructor in frame access sub-class

This is undefined behavior in C++ and Clang was complaining a lot
about this.