Merge branch '8-dos-energies-read-in-every-read_element-call' into 'm…

…aster'

Resolve "Dos energies read in every read_element call"

Closes orest-d#8

See merge request schlipf/py4vasp!7

src/py4vasp/data/dos.py

@@ -147,5 +147,5 @@ def _merge_labels(self, labels):
 
     def _read_element(self, index):
         sum_dos = lambda dos, i: dos + self._partial_dos[i]
-        zero_dos = np.zeros_like(self._energies[:])
+        zero_dos = np.zeros(len(self._energies))
         return functools.reduce(sum_dos, itertools.product(*index), zero_dos)