memset call with invalid value for fill character

[jwakely]

oneTBB/test/tbbmalloc/test_malloc_whitebox.cpp

Line 493 in db334fc

memset(ptr, minLargeObjectSize, minLargeObjectSize);

This calls memset with minLargeObjectSize as the fill character, but that's a value much larger than UCHAR_MAX so will be truncated. What's the purpose of this call? Could it use a different value that doesn't upset static analyzers?