Fix undefined unusedItems in CS6

Assets/DevTests/Animations/AlphaTests/Tortuga/hero_pirate.fla.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 55c438c941e894f25bb2b0527ee72f7c
+timeCreated: 1486989506
+licenseType: Free
+DefaultImporter:
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/FlashTools/Docs/CHANGELOG.txt

@@ -1,3 +1,9 @@
+-------------------
+-- Version 1.3.3 --
+-------------------
+
+Fix undefined unusedItems in CS6
+
 -------------------
 -- Version 1.3.2 --
 -------------------

Assets/FlashTools/FlashExport/FlashExport.jsfl

@@ -297,12 +297,14 @@
 	ftdoc.remove_unused_items = function (doc) {
 		ft.type_assert(doc, Document);
 		var unused_items = doc.library.unusedItems;
-		ft.array_reverse_foreach(unused_items, function(item) {
-			if (ft.verbose_mode) {
-				ft.trace_fmt("Remove unused item: {0}", item.name);
-			}
-			doc.library.deleteItem(item.name);
-		});
+		if (unused_items && unused_items !== undefined) {
+			ft.array_reverse_foreach(unused_items, function(item) {
+				if (ft.verbose_mode) {
+					ft.trace_fmt("Remove unused item: {0}", item.name);
+				}
+				doc.library.deleteItem(item.name);
+			});
+		}
 	};
 
 	ftdoc.unlock_all_timelines = function (doc) {