OSV-2020-1264 Use-of-uninitialized-value in AnnotAppearanceBuilder::drawText

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17607 Crash type: Use-of-uninitialized-value Crash state: AnnotAppearanceBuilder::drawText AnnotAppearanceBuilder::drawFormFieldChoice AnnotAppearanceBuilder::drawFormField...