Resolve "Follow-up from "Adding dnest4 Sampler""

Requires !888 (merged) Closes #533 (closed)

bilby/core/sampler/base_sampler.py

@@ -544,7 +544,8 @@ class Sampler(object):
 
 
 class NestedSampler(Sampler):
-    npoints_equiv_kwargs = ['nlive', 'nlives', 'n_live_points', 'npoints', 'npoint', 'Nlive', 'num_live_points']
+    npoints_equiv_kwargs = ['nlive', 'nlives', 'n_live_points', 'npoints',
+                            'npoint', 'Nlive', 'num_live_points', 'num_particles']
     walks_equiv_kwargs = ['walks', 'steps', 'nmcmc']
 
     def reorder_loglikelihoods(self, unsorted_loglikelihoods, unsorted_samples,