OSV-2020-1874 Use-of-uninitialized-value in load_truetype_glyph

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22182 Crash type: Use-of-uninitialized-value Crash state: loadtruetypeglyph TTLoadGlyph ttglyphload...