Fix numbers which start with country codes.

lib/global_phone/territory.rb

@@ -38,7 +38,7 @@ def strip_prefixes(string)
           string_without_prefix = string.sub(national_prefix_for_parsing, transform_rule)
         elsif starts_with_national_prefix?(string)
           string_without_prefix = string[national_prefix.length..-1]
-        elsif starts_with_country_code?(string)
+        elsif !possible?(string) && starts_with_country_code?(string)
           string_without_prefix = string[country_code.length..-1]
         end
 

test/context_test.rb

@@ -22,6 +22,11 @@ class ContextTest < TestCase
         :country_code => "44", :national_string => "2070313000"
     end
 
+    test "parsing national number for given territory with leading country code" do
+      assert_parses "3914172422", :with_territory => :it,
+        :country_code => "39", :national_string => "3914172422"
+    end
+
     test "parsing international number with prefix" do
       assert_parses "00 1 3125551212", :with_territory => :gb,
         :country_code => "1", :national_string => "3125551212"