modify the output of path

Author: qzhu2017

pyxtal/__init__.py

@@ -1966,7 +1966,7 @@ def get_transition(self, ref_struc, d_tol=1.0, d_tol2=0.3, N_images=2, max_path=
             if Skipped > 0:
                 print("Warning: ignore some solutions: ", Skipped)
 
-        return None, None, None, None
+            return None, None, None, p
 
     def get_transition_by_path(self, ref_struc, path, d_tol, d_tol2=0.5, N_images=2):
         """