Fixed setting of controller variable

Previously, the `controller` key was being set to the `area` variable. This didn't cause any bugs because neither `area` nor `controller` is being actively used. To prevent future bugs, however, am making sure this is set correctly.

Author: JeremyCaney

Ignia.Topics.Web.Mvc/TopicViewEngine.cs

@@ -33,6 +33,8 @@ public TopicViewEngine(IViewPageActivator viewPageActivator = null) : base(viewP
 
       /*------------------------------------------------------------------------------------------------------------------------
       | Define view location
+      >-------------------------------------------------------------------------------------------------------------------------
+      | Supports the following replacement tokens: {0} Controller, {1} View, {2} Area, and {3} Content Type.
       \-----------------------------------------------------------------------------------------------------------------------*/
       var viewLocations = new[] {
         "~/Views/{3}/{1}.cshtml",
@@ -174,7 +176,7 @@ private static List<string> GetSearchPaths(ControllerContext controllerContext,
         area = routeData.GetRequiredString("area");
       }
       if (routeData.Values.ContainsKey("controller")) {
-        area = routeData.GetRequiredString("controller");
+        controller = routeData.GetRequiredString("controller");
       }
       if (routeData.Values.ContainsKey("contenttype")) {
         routeData.Values.TryGetValue("contenttype", out contentType);