Check for the dir instead of relying on an exception.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7768 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record.rb

@@ -24,13 +24,15 @@
 $:.unshift(File.dirname(__FILE__)) unless
   $:.include?(File.dirname(__FILE__)) || $:.include?(File.expand_path(File.dirname(__FILE__)))
 
-unless defined?(ActiveSupport)
-  begin
-    $:.unshift(File.dirname(__FILE__) + "/../../activesupport/lib")  
-    require 'active_support'  
-  rescue LoadError
+unless defined? ActiveSupport
+  active_support_path = File.dirname(__FILE__) + "/../../activesupport/lib"
+  if File.exist?(active_support_path)
+    $:.unshift active_support_path
+    require 'active_support'
+  else
     require 'rubygems'
     gem 'activesupport'
+    require 'active_support'
   end
 end