Fixed that has_and_belongs_to_many didn't respect single table inheritance types #1081 [Florian Weber]

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@1641 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/test/fixtures/db_definitions/sqlserver.sql

@@ -39,7 +39,8 @@ CREATE TABLE developers (
 
 CREATE TABLE projects (
   id int NOT NULL IDENTITY(1, 1) PRIMARY KEY,
-  name varchar(100) default NULL
+  name varchar(100) default NULL,
+  type varchar(255) default NULL
 );
 
 CREATE TABLE developers_projects (