Fixed #444 - Unable to squash kvp with false values

lib/fog/core/attributes.rb

@@ -71,8 +71,10 @@ module Fog
             class_eval <<-EOS, __FILE__, __LINE__
               def #{name}=(new_data)
                 if new_data.is_a?(Hash)
-                  if new_data[:#{squash}] || new_data["#{squash}"]
-                    attributes[:#{name}] = new_data[:#{squash}] || new_data["#{squash}"]
+                  if new_data.has_key?(:#{squash})
+                    attributes[:#{name}] = new_data[:#{squash}]
+                  elsif new_data.has_key?("#{squash}")
+                    attributes[:#{name}] = new_data["#{squash}"]
                   else
                     attributes[:#{name}] = [ new_data ]
                   end

tests/core/attribute_tests.rb

@@ -19,6 +19,15 @@ Shindo.tests('Fog::Attributes', 'core') do
       @model.key
     end
 
+    tests('"keys" => {"id" => false}').returns(false) do
+      @model.merge_attributes("keys" => {'id' => false })
+      @model.key
+    end
+
+    tests('"keys" => {:id => false}').returns(false) do
+      @model.merge_attributes("keys" => {:id => false })
+      @model.key
+    end
   end
 
   tests(':type => :time') do
@@ -42,4 +51,4 @@ Shindo.tests('Fog::Attributes', 'core') do
 
   end
 
-end
+end