Add check that model exists during read_blif to avoid seg fault#3287

AlexandreSinger merged 1 commit intomasterverilog-to-routing/vtr-verilog-to-routing:masterfrom

fredt_check_model_existenceverilog-to-routing/vtr-verilog-to-routing:fredt_check_model_existenceCopy head branch name to clipboard