Enable the :showpostal option for GeocoderCA lookups.

lib/geocoder/lookups/geocoder_ca.rb

@@ -33,6 +33,7 @@ module Geocoder::Lookup
         params[:reverse] = 1
       else
         params[:locate] = query
+        params[:showpostal] = 1
       end
       "http://geocoder.ca/?" + hash_to_query(params)
     end

test/lookup_test.rb

@@ -27,4 +27,11 @@ class LookupTest < Test::Unit::TestCase
     g = Geocoder::Lookup::Yahoo.new
     assert_match "appid=MY_KEY", g.send(:query_url, "Madison Square Garden, New York, NY  10001, United States")
   end
+
+  def test_geocoder_ca_showpostal
+    Geocoder::Configuration.api_key = "MY_KEY"
+    g = Geocoder::Lookup::GeocoderCa.new
+    assert_match "showpostal=1", g.send(:query_url, "Madison Square Garden, New York, NY  10001, United States")
+  end
+
 end