Fix index calculation of default parameters

In case of multiple parameter lists the list index must also be taken into account

cask/src/cask/router/Macros.scala

@@ -67,7 +67,10 @@ class Macros[C <: blackbox.Context](val c: C) {
       val argReader = argReaders.lift(argListIndex).getOrElse(q"cask.router.NoOpParser.instanceAny")
       val flattenedArgLists = method.paramss(argListIndex)
       def hasDefault(i: Int) = {
-        val defaultName = s"${method.name}$$default$$${i + 1}"
+        // defaults are numbered globally on a class-level, this means that we
+        // must take into account the parameter index *as well as the parameter list index*
+        val defaultIdx = i + argListIndex + 1
+        val defaultName = s"${method.name}$$default$$$defaultIdx"
         if (curCls.members.exists(_.name.toString == defaultName)) Some(defaultName)
         else None
       }

example/decorated/app/src/Decorated.scala

@@ -40,5 +40,10 @@ object Decorated extends cask.MainRoutes{
     world + user
   }
 
+  @loggedIn()
+  @cask.get("/hello-default")
+  def defaults(world: String = "world")(user: User) = {
+    world + user
+  }
   initialize()
 }

example/decorated/app/test/src/ExampleTests.scala

@@ -21,7 +21,9 @@ object ExampleTests extends TestSuite{
       requests.get(s"$host/hello/woo").text() ==> "woo31337"
       requests.get(s"$host/internal/boo").text() ==> "boo[haoyi]"
       requests.get(s"$host/internal-extra/goo").text() ==> "goo[haoyi]31337"
-
+      requests.get(s"$host/internal-extra/goo").text() ==> "goo[haoyi]31337"
+      requests.get(s"$host/hello-default?world=worldz").text() ==> "worldz[haoyi]"
+      requests.get(s"$host/hello-default").text() ==> "world[haoyi]"
     }
   }
 }