fix typo

Author: ferrine

pymc3/variational/approximations.py

@@ -289,7 +289,7 @@ def randidx(self, size=None):
                          high=pm.floatX(self.histogram.shape[0]) - pm.floatX(1e-16))
                 .astype('int32'))
 
-    def _new_initial(self, size, deterministic):
+    def _new_initial(self, size, deterministic, more_replacements=None):
         theano_condition_is_here = isinstance(deterministic, tt.Variable)
         if theano_condition_is_here:
             return tt.switch(

pymc3/variational/opvi.py

@@ -884,7 +884,7 @@ def params(self):
         else:
             return collect_shared_to_list(self.shared_params)
 
-    def _new_initial_shape(self, size, dim, more_replacements):
+    def _new_initial_shape(self, size, dim, more_replacements=None):
         if self.batched:
             bdim = tt.as_tensor(self.bdim)
             bdim = theano.clone(bdim, more_replacements)