OSV-2020-1332 Index-out-of-bounds in xsltSetAttrVTsegment

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14273 Crash type: Index-out-of-bounds Crash state: xsltSetAttrVTsegment xsltCompileAttr xsltParseTemplateContent...