Analyzer: Drop PRETTY_THRESH value to 98

Analyzer: Drop PRETTY_THRESH value to 98

We have reserved five digits for the byte sizes in the print
output. However, if the size of a process happens to be for example
101272kB, the size is still below the 100 * 1024 = 102400 kB
threshold, which has in fact six digits.

Lowering the threshold to 98 will ensure the pretty output is never
more than five digits.

Signed-off-by: Timo Kokkonen <kaapeli@itanic.dy.fi>