Add a comment to clarify some piece of code.

diff --git a/btree_cache.c b/btree_cache.c
index 5ce689de8f11c75dfb4ffe57fe24beadb2536d78..5f5caeb8ddeb5a8ee5047ae290e964962f76c82a 100644 (file)
--- a/btree_cache.c
+++ b/btree_cache.c
@@ -257,7 +257,7 @@ static void balance_node(struct bt *node)
                        rotate_left(node);
                        rotate_left(node);
                        break;
-               default:
+               default://compiler pacifier: should never happen!
                        debuga(__FILE__,__LINE__,_("Failed to balance the b-tree cache"));
                        exit(EXIT_FAILURE);
                        break;