fixed a problem that choose wrong class if loaded nested class.

fix-guard-choose-wrong-guard-class.patch

diff --git a/lib/guard.rb b/lib/guard.rb
index b5a6c04..f4f826d 100644
--- a/lib/guard.rb
+++ b/lib/guard.rb
@@ -82,11 +82,7 @@ module Guard

     def get_guard_class(name)
       require "guard/#{name.downcase}"
-      klasses = []
-      ObjectSpace.each_object(Class) do |klass|
-        klasses << klass if klass.to_s.downcase.match(/^guard::#{name.downcase}/)
-      end
-      klasses.first
+      self.const_get(self.constants.find{|klass_name| klass_name.to_s.downcase == name.downcase })
     rescue LoadError
       UI.error "Could not find gem 'guard-#{name}', please add it in your Gemfile."
     end
@@ -98,4 +94,4 @@ module Guard
     end

   end
-end
\ No newline at end of file
+end
diff --git a/spec/guard_spec.rb b/spec/guard_spec.rb
index 74b9653..499a740 100644
--- a/spec/guard_spec.rb
+++ b/spec/guard_spec.rb
@@ -28,6 +28,14 @@ describe Guard do
       it "should return Guard::RSpec" do
         Guard.get_guard_class('rspec').should == Guard::RSpec
       end
+
+      context 'loaded some nested classes' do
+        it "should return Guard::RSpec" do
+          require 'guard/rspec'
+          Guard::RSpec.class_eval('class NotGuardClass; end')
+          Guard.get_guard_class('rspec').should == Guard::RSpec
+        end
+      end
     end

     describe ".locate_guard" do
@@ -82,4 +90,4 @@ describe Guard do
     end
   end

-end
\ No newline at end of file
+end