socket-label: mark socket_address_bind_ipv6_only_or_bool_from_string as _pure_

diff --git a/src/shared/socket-label.h b/src/shared/socket-label.h
index cfcb20f187ee1a5c7ec7a005163999828623ab85..c6fb8c3d2a8d66511f205f806336f4815d97862a 100644 (file)
--- a/src/shared/socket-label.h
+++ b/src/shared/socket-label.h
@@ -13,7 +13,7 @@ typedef enum SocketAddressBindIPv6Only {
 
 const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
 SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
-SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s);
+SocketAddressBindIPv6Only socket_address_bind_ipv6_only_or_bool_from_string(const char *s) _pure_;
 
 int socket_address_listen(
                 const SocketAddress *a,