[PATCH 1/2] genl: make l_genl_attr_recurse take a const pointer

The outer attribute iterator should be const since its not being
modified.
---
 ell/genl.c | 2 +-
 ell/genl.h | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/ell/genl.c b/ell/genl.c
index 2cae2f0..2c873ef 100644
--- a/ell/genl.c
+++ b/ell/genl.c
@@ -1761,7 +1761,7 @@ LIB_EXPORT bool l_genl_attr_next(struct l_genl_attr *attr,
 	return true;
 }
 
-LIB_EXPORT bool l_genl_attr_recurse(struct l_genl_attr *attr,
+LIB_EXPORT bool l_genl_attr_recurse(const struct l_genl_attr *attr,
 						struct l_genl_attr *nested)
 {
 	const struct nlattr *nla;
diff --git a/ell/genl.h b/ell/genl.h
index 7e5b7bb..42041fa 100644
--- a/ell/genl.h
+++ b/ell/genl.h
@@ -109,7 +109,8 @@ bool l_genl_msg_leave_nested(struct l_genl_msg *msg);
 bool l_genl_attr_init(struct l_genl_attr *attr, struct l_genl_msg *msg);
 bool l_genl_attr_next(struct l_genl_attr *attr, uint16_t *type,
 					uint16_t *len, const void **data);
-bool l_genl_attr_recurse(struct l_genl_attr *attr, struct l_genl_attr *nested);
+bool l_genl_attr_recurse(const struct l_genl_attr *attr,
+				struct l_genl_attr *nested);
 
 bool l_genl_family_info_has_group(const struct l_genl_family_info *info,
 					const char *group);
-- 
2.34.3