util: Added to_array() function.

util/lib/puppet/parser/functions/to_array.rb

@@ -0,0 +1,13 @@
+module Puppet::Parser::Functions
+    newfunction(:to_array, :type => :rvalue) do |args|
+        if args.length != 1
+            raise Puppet::ParseError, ("to_array(): wrong number of arguments (#{args.length}; must be 1)")
+        end
+        if args[0].is_a?(Array) then
+            args[0]
+        else
+            [ args[0] ]
+        end
+    end
+end
+