Fix signed div overflow, call checks & add tests#213

zanville wants to merge 2 commits intoOverclock-Validator:devOverclock-Validator/mithril:devfrom

zanville:fix/126-side-effects-after-error-in-vm-interpreterzanville/mithril:fix/126-side-effects-after-error-in-vm-interpreterCopy head branch name to clipboard