Use explicit coercion to do the equality check against the incomming value in th…

…e value binder's routine function. [#130]

@@ -308,7 +308,7 @@ Rivets.binders =
     routine: (el, value) ->
       if el.type is 'select-multiple'
         o.selected = o.value in value for o in el if value?
-      else if value isnt el.value
+      else if value?.toString() isnt el.value?.toString()
         el.value = if value? then value else ''
 
   text: (el, value) ->