fixed typo in io/parser.py

Author: davidovitch

pandas/io/parsers.py

@@ -991,7 +991,7 @@ def _convert_to_ndarrays(self, dct, na_values, na_fvalues, verbose=False,
                 try:
                     values = lib.map_infer(values, conv_f)
                 except ValueError:
-                    mask = lib.ismember(values, na_values).view(np.uin8)
+                    mask = lib.ismember(values, na_values).view(np.uint8)
                     values = lib.map_infer_mask(values, conv_f, mask)
                 coerce_type = False