[JAVA-304]: Problem with closing cursors - killCursor may try to close a cursor of id 0

Author: agirbal

src/main/com/mongodb/DBApiLayer.java

@@ -477,7 +477,7 @@ void killCursor() {
             if (_curResult == null)
                 return;
             long curId = _curResult.cursor();
-            if (curId < 0)
+            if (curId <= 0)
                 return;
 
             List<Long> l = new ArrayList<Long>();