include bugfix to [e792d4ab70448f79142fdf492390682ff5ea6398] for rubygems 1.0.1.  Gem::DependencyList#dependency_order was bombing with nil specs passed in from a frozen gem.  [#122]
include bugfix to [e792d4ab70448f79142fdf492390682ff5ea6398] for rubygems 1.0.1.  Gem::DependencyList#dependency_order was bombing with nil specs passed in from a frozen gem.  [#122]

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