cxxrtl: fix handling of 0-bit variables in vcd_writer.sample().
#1182
| Job | Run time |
|---|---|
| 3s | |
| 13m 8s | |
| 13m 11s |
vcd_writer.sample().
#1182
| Job | Run time |
|---|---|
| 3s | |
| 13m 8s | |
| 13m 11s |