Can't put curly brackets in DFB

[fadden]

Problem exists in 1.0 and 1.1.1. Test input file:

;        org     $1000

        dfb     ','
        dfb     '}'

Output:

Merlin32_111 v1.1.1, (c) Brutal Deluxe 2011-2015
  + Assemble project files...
[...]
    o Build Data Line...
      => [Error] Impossible to build Data line 'dfb  '}'' (line 4, file 'Test.S') : Impossible to evaluate dfb Data ''}'' ('''' can't be translated as an ascii expression).

In EvalExpressionAsInteger(), removing if(expression_param[i] != '{' && expression_param[i] != '}') makes the problem go away. But I don't know what other effects that has.