Fix crash in print_memory (#427)
Fix crash in print_memory (#427)

Fixes a stack-overflow when memory is, for example, "1020.17 TiB".

This fix limits the max number of memory decimals to 4.

The crash was probably introduced in 066e813331 .
i3/i3status,Dettorer/i3status,i3/i3status,i3/i3status,Gravemind/i3status,Dettorer/i3status,Gravemind/i3status,Gravemind/i3status,Dettorer/i3status,Dettorer/i3status,Gravemind/i3status,i3/i3status