Apply patch f082a5 to Matlab older than R2014b.

src/@dseries/round_.m

@@ -38,7 +38,7 @@ for i=1:vobs(o)
     end
 end
 
-if isoctave
+if isoctave || matlab_ver_less_than('8.4')
     o.data = round(o.data*10^n)/10^n;
 else
     o.data = round(o.data, n);