[Tcsh] configure fails on Debian 12 (bookworm)

[Kimmo Suominen]

| configure:8065: gcc -c -g -O2
-ffile-prefix-map=/home/builder/build-aAEu4Kg5pL/tcsh-6.24.09=.
-fstack-protector-strong -Wformat
-Werror=format-security -D_FILE_OFFSET_BITS=64 -Wdate-time
-D_FORTIFY_SOURCE=2 conftest.c >&5
| conftest.c: In function 'main':
| conftest.c:42:24: error: expected expression before ')' token
|    42 | if (sizeof ((socklen_t)))
|       |                        ^

root at 07589e99ecd2:/# gcc --version
gcc (Debian 12.2.0-14) 12.2.0