[vte] [ring] Add safeguards to remove()

[Behdad Esfahbod <behdad src gnome org>]

commit ffcb06a6bc2bf1d66eadf2e708ec444cf612f0c0
Author: Behdad Esfahbod <behdad behdad org>
Date:   Tue Aug 25 23:47:07 2009 -0400

    [ring] Add safeguards to remove()

 src/ring.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/ring.c b/src/ring.c
index dca3052..f92e340 100644
--- a/src/ring.c
+++ b/src/ring.c
@@ -215,6 +215,10 @@ void
 _vte_ring_remove(VteRing * ring, long position)
 {
 	long i;
+
+	g_return_if_fail(position >= ring->delta);
+	g_return_if_fail(position < ring->delta + ring->length);
+
 	_vte_debug_print(VTE_DEBUG_RING, "Removing item at position %ld.\n", position);
 	_vte_ring_validate(ring);