PostgreSQL: don't ignore port when host is nil since it's often used to label...

PostgreSQL: don't ignore port when host is nil since it's often used to label the domain socket. Closes #5247.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4401 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

 *SVN*
 
+* PostgreSQL: don't ignore port when host is nil since it's often used to label the domain socket.  #5247 [shimbo@is.naist.jp]
+
 * Records and arrays of records are bound as quoted ids. [Jeremy Kemper]
     Foo.find(:all, :conditions => ['bar_id IN (?)', bars])
     Foo.find(:first, :conditions => ['bar_id = ?', bar])

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -8,7 +8,7 @@ def self.postgresql_connection(config) # :nodoc:
 
       config = config.symbolize_keys
       host     = config[:host]
-      port     = config[:port]     || 5432 unless host.nil?
+      port     = config[:port] || 5432
       username = config[:username].to_s
       password = config[:password].to_s