rviz: added 'include <stddef.h>' to rviz.i to fix bug #5042 where ptrdiff_t is not defined on some systems
rviz: added 'include <stddef.h>' to rviz.i to fix bug #5042 where ptrdiff_t is not defined on some systems

git-svn-id: 0026580bb7e4cc6a4dfc3b6e5daae18624e1a30c@37425 eb33c2ac-9c88-4c90-87e0-44a10359b0c3

ros-visualization/rviz,ros-visualization/rviz,ros-visualization/rviz,ros-visualization/rviz,ros-visualization/rviz