Fix 'errors' stat in importer

Instead of:
GuiBulkImport done: Stored: 32  Duplicates: 0   Partial: 0  Errors: 32 in 0.530081987381 seconds - 0/sec

We have:
GuiBulkImport done: Stored: 0   Duplicates: 0   Partial: 0  Errors: 32 in 0.530081987381 seconds - 0/sec

pyfpdb/fpdb_import.py

@@ -468,6 +468,7 @@ class Importer:
                 errors = getattr(hhc, 'numErrors')
                 stored = getattr(hhc, 'numHands')
                 stored -= duplicates
+                stored -= errors
             else:
                 # conversion didn't work
                 # TODO: appropriate response?