fixed; finding by Date now works as expected

closes #336

lib/mongoose/schema/date.js

@@ -94,15 +94,18 @@ SchemaDate.prototype.$conditionalHandlers = {
 
 SchemaDate.prototype.castForQuery = function ($conditional, val) {
   var handler;
-  if (arguments.length === 2) {
-    handler = this.$conditionalHandlers[$conditional];
-    if (!handler)
-      throw new Error("Can't use " + $conditional + " with Date.");
-    return handler.call(this, val);
-  } else {
-    val = $conditional;
-    this.cast(val);
+
+  if (2 !== arguments.length) {
+    return this.cast($conditional);
   }
+
+  handler = this.$conditionalHandlers[$conditional];
+
+  if (!handler) {
+    throw new Error("Can't use " + $conditional + " with Date.");
+  }
+
+  return handler.call(this, val);
 };
 
 /**