fib: Expressive type for walk return code. Honour code.

Type: improvement

Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Change-Id: I487e698555545fce85d02d55deaaf7bb0007e388
diff --git a/src/vnet/fib/fib_attached_export.c b/src/vnet/fib/fib_attached_export.c
index 4a33b88..5ea96fd 100644
--- a/src/vnet/fib/fib_attached_export.c
+++ b/src/vnet/fib/fib_attached_export.c
@@ -205,7 +205,7 @@
 /**
  * Call back when walking a connected prefix's covered prefixes for import
  */
-static int
+static walk_rc_t
 fib_entry_covered_walk_import (fib_entry_t *cover,
 			       fib_node_index_t covered,
 			       void *ctx)
@@ -214,7 +214,7 @@
 
     fib_entry_import_add(import, covered);
 
-    return (0);
+    return (WALK_CONTINUE);
 }
 
 /*