fix regression in resetting collapse to auto on collapse open. (+ add spec and rebuild)

js/bootstrap-collapse.js

@@ -95,7 +95,7 @@
   , transition: function (method, startEvent, completeEvent) {
       var that = this
         , complete = function () {
-            if (startEvent == 'show') that.reset()
+            if (startEvent.type == 'show') that.reset()
             that.transitioning = 0
             that.$element.trigger(completeEvent)
           }

js/tests/unit/bootstrap-collapse.js

@@ -37,4 +37,18 @@ $(function () {
           .collapse('show')
       })
 
+      test("should reset style to auto after finishing opening collapse", function () {
+        $.support.transition = false
+        stop();
+        $('<div class="collapse" style="height: 0px"/>')
+          .bind('show', function () {
+            ok(this.style.height == '0px')
+          })
+          .bind('shown', function () {
+            ok(this.style.height == 'auto')
+            start()
+          })
+          .collapse('show')
+      })
+
 })