Merge pull request #13186 from seiriosPlus/selected_rows_size_fix

bug fix

python/paddle/fluid/transpiler/distribute_transpiler.py

@@ -1096,7 +1096,8 @@ class DistributeTranspiler(object):
             self.table_name]
 
         zero_dim = int(
-            math.ceil(origin_param_var.shape[0] / len(self.pserver_endpoints)))
+            math.ceil(origin_param_var.shape[0] / float(
+                len(self.pserver_endpoints))))
         table_shape = list(origin_param_var.shape)
         table_shape[0] = zero_dim