BUG: fix an issue where np.histogramdd could create infinite recursion on some inputs
#1959
| Job | Run time |
|---|---|
| 2m 47s | |
| 1m 0s | |
| 54s | |
| 1m 6s | |
| 4m 6s | |
| 3m 32s | |
| 49s | |
| 1m 53s | |
| 16m 7s |