darwin-nat.c variable shadowing

gistfile1.txt

darwin-nat.c: In function 'int darwin_decode_exception_message(mach_msg_header_t*, inferior**, darwin_thread_t**)':
darwin-nat.c:690:21: error: declaration of 'kret' shadows a previous local [-Werror=shadow=compatible-local]
       kern_return_t kret;
                     ^~~~
darwin-nat.c:626:17: note: shadowed declaration is here
   kern_return_t kret;
                 ^~~~
darwin-nat.c: In function 'ptid_t darwin_decode_message(mach_msg_header_t*, darwin_thread_t**, inferior**, target_waitstatus*)':
darwin-nat.c:1128:14: error: declaration of 'res' shadows a previous local [-Werror=shadow=compatible-local]
        pid_t res;
              ^~~
darwin-nat.c:1101:11: note: shadowed declaration is here
       int res;
           ^~~
darwin-nat.c: In member function 'virtual void darwin_nat_target::kill()':
darwin-nat.c:1562:24: error: declaration of 'priv' shadows a previous local [-Werror=shadow=compatible-local]
       darwin_inferior *priv = get_darwin_inferior (inf);
                        ^~~~
darwin-nat.c:1528:20: note: shadowed declaration is here
   darwin_inferior *priv = get_darwin_inferior (inf);