Fix BdG test evaluation

tests/KKRhost/tools/test_verify_BdG.py

@@ -59,7 +59,7 @@ class Test_BdG():
         d = abs(dqe-dqh[::-1])
         dm = d.max()
         print('ehsymm', dm, dm/dqe[d==dm])
-        assert dm/dqe[d==dm] < 2e-4
+        assert any(dm/dqe[d==dm]) < 2e-4
         gz = (dqe[1]).max()/(dqe[0]).max()
         print('gapzero', gz)
         assert gz<0.012