obi stats: fixed error when printing bool keys

python/obitools3/commands/stats.pyx

@@ -251,7 +251,7 @@ def run(config):
     for i in range(len(sorted_stats)):
         c = sorted_stats[i][0]
         for v in c:
-            if v is not None:
+            if type(v) == bytes:
                 print(pcat % tostr(v)+"\t", end="")
             else:
                 print(pcat % str(v)+"\t", end="")
@@ -268,6 +268,6 @@ def run(config):
         print("%7d" %catcount[c], end="")
         print("%9d" %totcount[c])
 
-    input[0].close()
+    input[0].close(force=True)
     
     logger("info", "Done.")