pcbnew: the cairo canvas ignore arc width

[Eldar Khayrullin]

The Cairo canvas ignores arc width when displays arc.

Application: pcbnew
Version: (2017-04-15 revision 60310b3d3)-master, debug build
Libraries: wxWidgets 3.0.2
           libcurl/7.52.1 OpenSSL/1.0.2g zlib/1.2.11 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) librtmp/2.3
Platform: Linux 4.10.0-19-generic x86_64, 64 bit, Little endian, wxGTK
- Build Info -
wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8)
Boost: 1.62.0
Curl: 7.52.1
KiCad - Compiler: GCC 6.3.0 with C++ ABI 1010
        Settings: USE_WX_GRAPHICS_CONTEXT=OFF
                  USE_WX_OVERLAY=OFF
                  KICAD_SCRIPTING=ON
                  KICAD_SCRIPTING_MODULES=ON
                  KICAD_SCRIPTING_WXPYTHON=ON
                  KICAD_SCRIPTING_ACTION_MENU=ON
                  BUILD_GITHUB_PLUGIN=ON
                  KICAD_USE_OCE=ON

[KiCad Janitor (kicad-janitor)]

Fixed in revision e97c91b0253da3d9a1e92791107419b7323f8a06
https://git.launchpad.net/kicad/patch/?id=e97c91b0253da3d9a1e92791107419b7323f8a06