libxslt/xslt: Use-of-uninitialized-value in xmlStrlen

Project: https://gitlab.gnome.org/GNOME/libxslt.git Detailed report: https://oss-fuzz.com/testcase?key=5669481868689408 Project: libxslt Fuzzer: libFuzzerlibxsltxslt Fuzz target binary: xslt Job Type: libfuzzermsanlibxslt Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address:...