Fix for installing from_url

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Library/Homebrew/formula.rb

@@ -692,7 +692,7 @@ end
 # see flac.rb for example usage
 class GithubGistFormula < ScriptFileFormula
   def initialize name='__UNKNOWN__', path=nil
-    super name
+    super name, path
     @version=File.basename(File.dirname(url))[0,6]
   end
 end