wrong count of restoring tabs if the BarTab is installed. (fix for https://github.com/piroor/treestyletab/issues#issue/40 )

content/treestyletab/treestyletab.js

@@ -1793,7 +1793,11 @@ var TreeStyleTabService = {
 					var owner = aTab.linkedBrowser;
 					var data = owner.__SS_data || // Firefox 3.6-
 								owner.parentNode.__SS_data; // -Firefox 3.5
-					return data && data._tabStillLoading;
+					return (
+						data &&
+						data._tabStillLoading &&
+						!aTab.hasAttribute('ontap') // if BarTab is installed, to-be-restored tab possibly has the value unexpectedly.
+						);
 				}).length;
 	},