Sanity-check for null dirty rectangles.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1857 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/RegionManager.java

@@ -1,5 +1,5 @@
 //
-// $Id: RegionManager.java,v 1.4 2002/10/17 02:11:58 ray Exp $
+// $Id: RegionManager.java,v 1.5 2002/10/29 20:33:26 shaper Exp $
 
 package com.threerings.media;
 
@@ -47,10 +47,16 @@ public class RegionManager
      */
     public void addDirtyRegion (Rectangle rect)
     {
-        if (rect.width != 0 && rect.height != 0) {
+        // sanity-check the rectangle
-//             Log.info("Invalidating " + StringUtil.toString(rect));
+        if (rect == null || (rect.width <= 0 || rect.height <= 0)) {
-            _dirty.add(rect);
+            Log.warning("Attempt to add invalid rectangle as a dirty region?!" +
+                        "[rect=" + StringUtil.toString(rect) + "].");
+            Thread.dumpStack();
+            return;
         }
+
+        // Log.info("Invalidating " + StringUtil.toString(rect));
+        _dirty.add(rect);
     }
 
     /**