FIX: empty list to reshape2d

Author: jklymak

lib/matplotlib/cbook/__init__.py

@@ -1416,6 +1416,8 @@ def _reshape_2D(X, name):
     """
     # Iterate over columns for ndarrays, over rows otherwise.
     X = np.atleast_1d(X.T if isinstance(X, np.ndarray) else np.asarray(X))
+    if len(X) == 0:
+        return [[]]
     if X.ndim == 1 and not isinstance(X[0], collections.abc.Iterable):
         # 1D array of scalars: directly return it.
         return [X]