Fixed g++ 7 fall through warnings

[racko]

No description provided.

[dirk-thomas]

Maybe this should use a -Wimplicit-fallthrough=4 compliant comment. I would suggest // lint -fallthrough since it makes it also clear that the comments purpose is related to linting.

[racko]

11:06:13 [test_rosbag.rosunit-r03random_play/test_random_play][FAILURE]------------------
11:06:13 False is not true
11:06:13   File "/usr/lib/python2.7/unittest/case.py", line 329, in run
11:06:13     testMethod()
11:06:13   File "/tmp/catkin_workspace/src/ros_comm/test/test_rosbag/bag_migration_tests/test/random_play.py", line 155, in test_random_play
11:06:13     self.assertTrue(abs(input_time - expect_time) < .5)
11:06:13   File "/usr/lib/python2.7/unittest/case.py", line 422, in assertTrue
11:06:13     raise self.failureException(msg)

Let's check if I can retrigger the test :)

[racko]

@ros-pull-request-builder retest this please

[racko]

bump

[dirk-thomas]

Thanks for the patch.