dlplibs/morefuzzer: Use-of-uninitialized-value in librevenge::doubleToString

Detailed report: https://oss-fuzz.com/testcase?key=5423406051753984 Project: dlplibs Fuzzer: libFuzzerdlplibsmorefuzzer Fuzz target binary: morefuzzer Job Type: libfuzzermsandlplibs Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: librevenge::doubleToString...