external/freetype: Avoid nullptr-with-offset

> workdir/UnpackedTarball/freetype/src/truetype/ttgxvar.c:967:17: runtime error: applying zero offset to null pointer
>  #0 in ft_var_get_item_delta at workdir/UnpackedTarball/freetype/src/truetype/ttgxvar.c:967:17
>  #1 in tt_hvadvance_adjust at workdir/UnpackedTarball/freetype/src/truetype/ttgxvar.c:1138:13
>  #2 in tt_hadvance_adjust at workdir/UnpackedTarball/freetype/src/truetype/ttgxvar.c:1162:12
>  #3 in tt_face_get_metrics at workdir/UnpackedTarball/freetype/src/sfnt/ttmtx.c:326:11
>  #4 in TT_Get_HMetrics at workdir/UnpackedTarball/freetype/src/truetype/ttgload.c:104:5
>  #5 in tt_get_advances at workdir/UnpackedTarball/freetype/src/truetype/ttdriver.c:269:9
>  #6 in FT_Get_Advance at workdir/UnpackedTarball/freetype/src/base/ftadvanc.c:97:15
>  #7 in af_shaper_get_elem at workdir/UnpackedTarball/freetype/src/autofit/afshaper.c:673:7
>  #8 in af_latin_metrics_check_digits at workdir/UnpackedTarball/freetype/src/autofit/aflatin.c:1105:21
>  #9 in af_latin_metrics_init at workdir/UnpackedTarball/freetype/src/autofit/aflatin.c:1156:7
>  #10 in af_face_globals_get_metrics at workdir/UnpackedTarball/freetype/src/autofit/afglobal.c:462:17
>  #11 in af_loader_load_glyph at workdir/UnpackedTarball/freetype/src/autofit/afloader.c:306:13
>  #12 in af_autofitter_load_glyph at workdir/UnpackedTarball/freetype/src/autofit/afmodule.c:489:13
>  #13 in FT_Load_Glyph at workdir/UnpackedTarball/freetype/src/base/ftobjs.c:978:19
>  #14 in FreetypeFont::GetGlyphOutline(unsigned short, basegfx::B2DPolyPolygon&, bool) const at vcl/unx/generic/glyphs/freetype_glyphcache.cxx:903:19
[...]

during CppunitTest_svx_unit

Change-Id: I6d45ec44006458350629edf06b8ec092a450ea05
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/132357
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions