Make sure to initialize the end_mark for yaml_event_t. (#849)
Make sure to initialize the end_mark for yaml_event_t. (#849)

This just clears out some warnings from clang static analysis.

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@openrobotics.org>
ros2/rcl,ros2/rcl