Incorrect removal of parentheses after the comma operator followed by a compound statement

[kousuke3021]

When converting the following code into an Abstract Syntax Tree (AST) and generating code from it using pycparser, the parentheses surrounding a compound statement are removed, resulting in code that fails to compile due to a syntax error.

void test(){
    (sizeof (0), ({ if (0) ; else ; }));
}

The generated code appears as follows:

void test(){
    sizeof (0), { if (0) ; else ; };
}

[eliben]

PRs to fix this are welcome.

Please note that the ability to generate C code back from the AST is not considered a critical capability of pycparser; while I'll accept PRs for it, it's generally lower priority than the parsing part.