Add missing closing bracket in #ifdef'd out code block

Causing uncrustify (0.80) to assert:

do_source_file: Parsing: execmisc.cpp as language CPP
parse_cleanup(479): pc orig line is 1257, orig col is 55, Text() is ')', type is PAREN_CLOSE
parse_cleanup(485): (frm.top().type + 1) is SQUARE_CLOSE
parse_cleanup(492): File: execmisc.cpp, orig line is 1257, orig col is 55, Error: Unexpected ')' for 'SQUARE_OPEN', which was on line 1257