use C99 not gcc extensions

diff --git a/src/lib/io/track.c b/src/lib/io/track.c
index ae6059746fb7623f6218af5656be558d53991b2c..82b9df1a59d24a268f9f1d2a1c6aa13ffa2c3d0b 100644 (file)
--- a/src/lib/io/track.c
+++ b/src/lib/io/track.c
@@ -63,7 +63,7 @@ struct fr_tracking_t {
 
        rbtree_t        *tree;          //!< for unconnected sockets
 
-       fr_tracking_entry_t *codes[0];
+       fr_tracking_entry_t *codes[];
 };