Tabs: Handle overly-precise values in tests in IE

Closes gh-1628

(cherry picked from commit 81a0029)

Author: scottgonzalez

tests/unit/tabs/tabs_test_helpers.js

@@ -40,7 +40,10 @@ TestHelpers.tabs = {
 
 	equalHeight: function( tabs, height ) {
 		tabs.find( ".ui-tabs-panel" ).each(function() {
-			equal( $( this ).outerHeight(), height );
+
+			// Handle overly-precise values
+			var actualHeight = parseFloat( $( this ).outerHeight().toFixed( 1 ) );
+			equal( actualHeight, height );
 		});
 	},