applying patch from Steven Bellens https://code.ros.org/trac/ros/ticket/3915
applying patch from Steven Bellens https://code.ros.org/trac/ros/ticket/3915

aymanim/rosdep,alessandro-aglietti/rosdep,wkentaro/rosdep,georgepar/rosdep,spaghetti-/rosdep,allenh1/rosdep,alessandro-aglietti/rosdep,aymanim/rosdep,allenh1/rosdep,sorki/rosdep,wkentaro/rosdep,ros-infrastructure/rosdep,spaghetti-/rosdep,sorki/rosdep,ros-infrastructure/rosdep,georgepar/rosdep