small bug fix in printing.pydotprint_variables, fixes a "variables used before

theano/printing.py

@@ -665,12 +665,13 @@ def pydotprint_variables(vars,
             dstr = 'val='+str(var.data)
             if '\n' in dstr:
                 dstr = dstr[:dstr.index('\n')]
+            if len(dstr) > max_label_size:
+                dstr = dstr[:max_label_size-1]+'...'
             varstr = '%s [%s]'% (dstr, str(var.type))
         else:
             #a var id is needed as otherwise var with the same type will be merged in the graph.
             varstr = str(var.type)
-        if len(dstr) > max_label_size:
-            dstr = dstr[:max_label_size-1]+'...'
+
         varstr += ' ' + str(len(var_str))
         var_str[var]=varstr
         return varstr