std.c.SIG: make it non-exhaustive

54a84964f8e3cd015688c6929612f7438b7e9553 did this for std.os.linux.SIG
but I neglected to also do it for std.c.SIG
1face9ad78Andrew Kelley committed on 1/8/2026, 7:52:42 PMparentd1be8b1
1 file changedLine totals unavailable