Work around windows dtype issue in tests

Author: bsipocz

astroquery/sdss/tests/test_sdss.py

@@ -145,7 +145,7 @@ def url_tester_crossid(data_release):
 def compare_xid_data(xid, data):
     for col in xid.colnames:
         if xid[col].dtype.type is np.str_:
-            assert xid[col] == data[col]
+            assert all(xid[col] == data[col])
         else:
             assert_allclose(xid[col], data[col])