Blender Git Loki

Replace MFace w/ MLoopTri in imapaint_pick_uv

D1415 by @scorpion81, with minor edits

Fix (IRC reported) inverted behavior of select more/less in VSE.

Also, cleaned up a bit that code, and added releavnt entries in Select menu.

Reported on IRC by Leon Cheung, thanks!

CMake: Disable Werror in extern/libmv for now

It gives issues with Glog compiled in release mode.

Need to revisit the directory layout here and compiler flag, because technically
libmv is now more an intern/ library and i'll actually prefer it to be covered
with strict flags as well. But it's a bit tricky because of libraries which we
don't maintain are in the libmv subfolder.

Cleanup: whitespace & break placement

CMake: Add option to enable -Werror cflag in some areas

It is rather annoying attitude nowadays to use const qualifier all over the
place, including using it for multi-dimensional arrays. This isn't really
supported in GCC prior to version 5.0 because it considers such an arrays
to be a "pointer to a const pointer" which gives implicit casting errors.

It's not possible to disable this particular type of warnings treated as
errors in any GCC version prior to 5.0 as well, meaning currently usage of
-Werror globally in Blender code is not possible at all.

This commit makes it possible to use -Werror in areas which are complaint
with older GCC versions. New advanced CMake options are:

- WITH_COMPOSITOR_WERROR
- WITH_LIBMV_WERROR
- WITH_CYCLES_WERROR

Cleanup: whitespace, wrong indent level

Cleanup: whitespace (CMake)

CMake: Fix indentation around LLVM detection code

Cleanup: ws

Only use material callback when enabled

Vert/Face select in painting modes weren't drawing after recent changes.

Add check for GPU materials enable state

Avoid getting the original index if its not needed

Absent-mindedness...Remove testing code

Fix GLSL code not working correctly for Macs without VBO, again report
by scorpion81 on irc

Fix T45469: Vertex Group weight = 0.0 in scene 2.

Fix T45464: Blender Sequencer "Select Strips to the Left" produces opposite behavior to what is intended.

Logic was just broken for the LEFT case here.

Also cleaned up and made behavior more consistant between strips and markers.

Fix issue reported by scorpion81 on irc: material mode + flat shading
artifacts in cycles textured mode.

Avoid double index lookup mesh/selection drawing

Avoid accessing MTFace drawing subsurf

Fix another index error, made multimaterial mapped meshes draw
incorrectly.