Fix issue with singles.

Single now plays more nicely with other mixins, so PrependMigrate works.

Author: scriptjunkie

lib/msf/core/payload/single.rb

@@ -37,7 +37,7 @@ def generate
 			# Otherwise, just use the default method to generate the single
 			# payload
 			else
-				internal_generate
+				super
 			end
 		end
 	end