Fixed that every successive call on the sqlite adapter prepended RAILS_ROOT again and again because RAILS_ROOT itself is the Windows absolute path which begins with the drive letter #294

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@139 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/connection_adapters/sqlite_adapter.rb

@@ -13,7 +13,7 @@ module ActiveRecord
         raise ArgumentError, "No database file specified. Missing argument: dbfile"
       end
       
-      config[:dbfile] = File.join(RAILS_ROOT, config[:dbfile]) if config[:dbfile] =~ /^\w/ && Object.const_defined?(:RAILS_ROOT)
+      config[:dbfile] = File.expand_path(config[:dbfile], RAILS_ROOT) if Object.const_defined?(:RAILS_ROOT)
       db = SQLite::Database.new(config[:dbfile], 0)
 
       db.show_datatypes   = "ON" if !defined? SQLite::Version