Minor -vv issue.

[Piqlet]

I use tar -I 'zstd -T0 --long -vv' -cf command and decompression only 2 MiB required, instead --long (default) 128 MiB.

*** zstd command line interface 64-bits v1.5.1, by Yann Collet ***
Note: 4 physical core(s) detected 
--zstd=wlog=21,clog=16,hlog=17,slog=1,mml=5,tlen=0,strat=2
--format=.zst --block-size=0 --memory=134217728 --threads=4 --content-size
Using stdin for input 
Using stdout for output 
Sparse File Support is automatically disabled on stdout ; try --sparse 
Decompression will require 2097152 B of memory
/*stdin*\            : Completed in 1.63 sec  (cpu load : 198%)                B => 98.47%