Fixup! Make drawing all PES diagrams an option in the input file.

When the pdep_settings was made from an Arkane explorer job rather
than an RMG run, the generate_PES_diagrams attribute does not exist.
So we now assume False if not specified.

Author: rwest

rmgpy/rmg/pdep.py

@@ -872,7 +872,7 @@ def update(self, reaction_model, pdep_settings, requires_rms=False):
         if output_directory:
             job.save_input_file(
                 os.path.join(output_directory, 'pdep', 'network{0:d}_{1:d}.py'.format(self.index, len(self.isomers))))
-            if pdep_settings.generate_PES_diagrams:
+            if getattr(pdep_settings, 'generate_PES_diagrams', False):
                 job.draw(os.path.join(output_directory, 'pdep'), filename_stem=f'network{self.index:d}_{len(self.isomers):d}', file_format='pdf')
 
         # Calculate the rate coefficients