protection if grep in oils rpt tree returns null

diff --git a/Open-ILS/web/reports/oils_rpt_tree.js b/Open-ILS/web/reports/oils_rpt_tree.js
index 35dec1f..b9bfa2c 100644 (file)
--- a/Open-ILS/web/reports/oils_rpt_tree.js
+++ b/Open-ILS/web/reports/oils_rpt_tree.js
@@ -18,11 +18,12 @@ function oilsLoadRptTree(callback) {
 }
 
 function oilsRptFindField(node, field) {
-       return grep( node.fields, 
+       var g = grep( node.fields, 
                function(f) {
                        return (f.name == field);
                }
-       )[0];
+       );
+       return g ? g[0] : [];
 }