fix call of reshape on dti, only call on ndarray

Author: sdementen

pandas/core/internals.py

@@ -2390,11 +2390,12 @@ def get_values(self, dtype=None):
             f = lambda x: lib.Timestamp(x, tz=self.values.tz)
             values = lib.map_infer(
                 self.values.ravel(), f).reshape(self.values.shape)
+
+            if values.ndim == self.ndim - 1:
+                values = values.reshape((1,) + values.shape)
         else:
-            values = self.values
+            return self.values
 
-        if values.ndim == self.ndim - 1:
-            values = values.reshape((1,) + values.shape)
         return values
 
     def to_object_block(self, mgr):