[master] f2da1a3f3 vcc_expr: bring back cname

[Nils Goroll]

commit f2da1a3f3652273bcb9152f2ef475f2ccfb91e3f
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Wed Feb 19 15:34:13 2025 +0100

    vcc_expr: bring back cname
    
    This reverts commit ab78f460dc0e4a3add6a1c6df8621d71ddf08583.

diff --git a/lib/libvcc/vcc_expr.c b/lib/libvcc/vcc_expr.c
index 003f1513c..1e3a6e054 100644
--- a/lib/libvcc/vcc_expr.c
+++ b/lib/libvcc/vcc_expr.c
@@ -444,6 +444,7 @@ vcc_priv_arg(struct vcc *tl, const char *p, struct symbol *sym)
 struct func_arg {
 	vcc_type_t		type;
 	const struct vjsn_val	*enums;
+	const char		*cname;
 	const char		*name;
 	const char		*val;
 	struct expr		*result;