protoize aborts on comment in #define

[bert at xpilot dot org (Bert Gijsbers)]

Here's a short C example on which protoize aborts.
Apparently protoize doesn't strip comments before
parsing preprocessor symbols in do_cleaning().
In this example it can't find the closing ' character. 

Bert Gijsbers

#define A 1 /* one comment in a define
               shouldn't crash, or? */

int some_fun(arg)
    int arg;
{
    return arg + 1;
}