OSV-2022-996 Use-of-uninitialized-value in GrTriangulator::sanitizeContours

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=51921 Crash type: Use-of-uninitialized-value Crash state: GrTriangulator::sanitizeContours GrTriangulator::contoursToPolys GrTriangulator::pathToPolys...