[gupnp] linux-cm: ifdef IFA_FLAGS use

[Jens Georg <jensgeorg src gnome org>]

commit 40fb8e3cd20451680d72df05b03bf564925460d9
Author: Jens Georg <mail jensge org>
Date:   Fri Feb 5 19:27:03 2016 +0100

    linux-cm: ifdef IFA_FLAGS use
    
    Looks like it was a recent addition.
    
    Signed-off-by: Jens Georg <mail jensge org>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760217

 libgupnp/gupnp-linux-context-manager.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libgupnp/gupnp-linux-context-manager.c b/libgupnp/gupnp-linux-context-manager.c
index 09a2fcf..cdf2ae3 100644
--- a/libgupnp/gupnp-linux-context-manager.c
+++ b/libgupnp/gupnp-linux-context-manager.c
@@ -128,7 +128,9 @@ dump_rta_attr (struct rtattr *rt_attr)
                 case IFA_ANYCAST: label = "IFA_ANYCAST"; break;
                 case IFA_CACHEINFO: label = "IFA_CACHEINFO"; break;
                 case IFA_MULTICAST: label = "IFA_MULTICAST"; break;
+#if defined(IFA_FLAGS)
                 case IFA_FLAGS: label = "IFA_FLAGS"; break;
+#endif
                 default: label = "Unknown"; break;
         }