Only add check_dependencies as a test prerequisite when Jeweler is fo…

…und.

This avoids aborting the “rake test” if Jeweler is not installed.

Rakefile

@@ -16,6 +16,8 @@ begin
     # gem is a Gem::Specification... see http://www.rubygems.org/read/chapter/20 for additional settings
   end
   Jeweler::GemcutterTasks.new
+
+  task :spec => :check_dependencies
 rescue LoadError
   puts "Jeweler (or a dependency) not available. Install it with: gem install jeweler"
 end
@@ -32,8 +34,6 @@ Spec::Rake::SpecTask.new(:rcov) do |spec|
   spec.rcov = true
 end
 
-task :spec => :check_dependencies
-
 task :default => :spec
 
 require 'rake/rdoctask'