[libgee] PriorityQueue: build fix for wrong variable name

[Diego Escalante Urrelo <diegoe src gnome org>]

commit d8a2b39d85950d085e59db8cb5b7b7a872774a83
Author: Diego Escalante Urrelo <descalante igalia com>
Date:   Fri Oct 7 01:07:12 2011 -0500

    PriorityQueue: build fix for wrong variable name
    
    Bug #661153

 gee/priorityqueue.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gee/priorityqueue.vala b/gee/priorityqueue.vala
index 65ca7a2..82e5229 100644
--- a/gee/priorityqueue.vala
+++ b/gee/priorityqueue.vala
@@ -670,7 +670,7 @@ public class Gee.PriorityQueue<G> : Gee.AbstractQueue<G> {
 				_a[degree] = null;
 
 				int i = _a.length - 1;
-				while (a >= 0 && _a[i] == null) {
+				while (i >= 0 && _a[i] == null) {
 					i--;
 				}
 				_a.resize (i + 1);