[gnome-weather] Fix a warning in param.js

[Giovanni Campagna <gcampagna src gnome org>]

commit d863231c95f4a9a1695f8c837d49cac4287b6657
Author: Giovanni Campagna <gcampagna src gnome org>
Date:   Sat May 4 15:28:23 2013 +0200

    Fix a warning in param.js
    
    I must remember to fix this if I merge it in gjs...

 src/params.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/params.js b/src/params.js
index 4b8e1c4..4bbade0 100644
--- a/src/params.js
+++ b/src/params.js
@@ -78,7 +78,7 @@ function parse(params, defaults) {
 // Return value: a new object, containing the merged parameters from
 // @params and @defaults
 function fill(params, defaults) {
-    let ret = {};
+    let ret = {}, prop;
     params = params || {};
 
     for (prop in params)