[Bug c/92671] gcc/c/c-parser.c: minor ( and ) tidyup

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92671

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
I don't think this is a confusing case of precedence, i.e. the proposed 
change is not an improvement.