Eliminate recently introduced reflection warnings

src/monger/collection.clj

@@ -26,7 +26,7 @@
   (zipmap fields (repeat 1)))
 
 (definline check-not-nil!
-  [ref message]
+  [ref ^String message]
   `(when (nil? ~ref)
      (throw (IllegalArgumentException. ~message))))
 

test/monger/test/db.clj

@@ -2,7 +2,8 @@
   (:require [monger core db]
             [monger.test.helper :as helper]
             [monger.collection :as mgcol])
-  (:import (com.mongodb Mongo DB))
+  (:import [com.mongodb Mongo DB]
+           [java.util Set])
   (:use [clojure.test]))
 
 (helper/connect!)
@@ -34,6 +35,6 @@
 (deftest test-get-collection-names
   (mgcol/insert "test-1" { :name "Clojure" })
   (mgcol/insert "test-2" { :name "Clojure" })
-  (let [collections (monger.db/get-collection-names)]
+  (let [^Set collections (monger.db/get-collection-names)]
     (is (.contains collections "test-1"))
     (is (.contains collections "test-2"))))