changed pluralizer to also handle zero values from lambda

lib/globalize/backend/pluralizing.rb

@@ -3,11 +3,13 @@
 module Globalize
   module Backend
     class Pluralizing < I18n::Backend::Simple
+
       def pluralize(locale, entry, count)
         return entry unless entry.is_a?(Hash) and count
-        key = :zero if count == 0 && entry.has_key?(:zero)
-        key ||= pluralizer(locale).call(count)
-        raise InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)
+        key = pluralizer(locale).call(count)
+        # use other as fallback for zero if zero entry is not available
+        key = :other if key == :zero && !entry.has_key?(:zero)
+        raise I18n::InvalidPluralizationData.new(entry, count) unless entry.has_key?(key)
         translation entry[key], :plural_key => key
       end
 
@@ -18,14 +20,14 @@ def add_pluralizer(locale, pluralizer)
       def pluralizer(locale)
         pluralizers[locale.to_sym] || default_pluralizer
       end
-
+      
       protected
         def default_pluralizer
           pluralizers[:en]
         end
 
         def pluralizers
-          @pluralizers ||= { :en => lambda{|n| n == 1 ? :one : :other } }
+          @pluralizers ||= { :en => lambda{|n| n == 1 ? :one : ( n == 0 ? :zero : :other) } }
         end
 
         # Overwrite this method to return something other than a String