Raise EmptyMeshPlottingError in Plotter.plot_contour when mesh is empty

Author: PProfizi

src/ansys/dpf/core/plotter.py

@@ -892,6 +892,8 @@ def plot_contour(
             mesh = meshed_region
         else:
             mesh = self._mesh
+        if mesh.elements.n_elements == 0 and mesh.nodes.n_nodes == 0 and mesh.faces.n_faces == 0:
+            raise dpf_errors.EmptyMeshPlottingError
 
         # get mesh scoping
         location = None