OSV-2018-17 Use-of-uninitialized-value in FT_Set_Transform

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8811 Crash type: Use-of-uninitialized-value Crash state: FTSetTransform SplashFTFont::makeGlyph SplashFont::getGlyph...