assertion failure when calling up 3D view

[Chris Pavlina]

Attached PCB causes an assertion failure when the 3D view is called up.

/home/cmp/git/kicad/pcbnew/specctra_export.cpp(292): assert "graphic->Type() == PCB_LINE_T" failed in findPoint().

If you force it to continue, it does eventually come up in what appears to be a semblance of correctness...

Application: pcbnew
Version: (2016-02-14 BZR 6556, Git aa6beaa)-product debug build
wxWidgets: Version 3.0.2 (debug,wchar_t,compiler with C++ ABI 1002,GCC 4.2.1,wx containers,compatible with 2.8)
Platform: Linux 4.4.1-2-ARCH x86_64, 64 bit, Little endian, wxGTK
Boost version: 1.60.0
         USE_WX_GRAPHICS_CONTEXT=OFF
         USE_WX_OVERLAY=OFF
         KICAD_SCRIPTING=ON
         KICAD_SCRIPTING_MODULES=ON
         KICAD_SCRIPTING_WXPYTHON=ON
         USE_FP_LIB_TABLE=HARD_CODED_ON
         BUILD_GITHUB_PLUGIN=ON