JSON-PARSER: Fixed bug in properly reading neg #s
JSON-PARSER: Fixed bug in properly reading neg #s

YosysHQ/nextpnr,SymbiFlow/nextpnr,SymbiFlow/nextpnr,SymbiFlow/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,SymbiFlow/nextpnr