also check *.h files

.travis.yml

@@ -13,7 +13,7 @@ before_install:
   - sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu precise main" > /etc/apt/sources.list.d/ros-latest.list'
   - sudo apt-key adv --keyserver hkp://pool.sks-keyservers.net --recv-key 0xB01FA116
   - sudo apt-get update -qq
-  - sudo apt-get install -qq -y python-rosdep python-rosinstall-generator python-wstool python-rosinstall build-essential python-catkin-pkg python-rosdep
+  - sudo apt-get install -qq -y python-rosdep python-rosinstall-generator python-wstool python-rosinstall build-essential python-catkin-pkg
   - sudo rosdep init
   - rosdep update
   - sudo apt-get install ros-${ROS_DISTRO}-ros-base
@@ -33,7 +33,7 @@ before_script: # Use this to prepare your build for testing e.g. copy database c
   - source /opt/ros/${ROS_DISTRO}/setup.bash
   - cd ~/hand_control_ws
   - cd src
-  - cpplint *.hpp *.cpp
+  - cpplint *.hpp *.cpp *.h
   - cd ..
 script: # All commands must exit with code 0 on success. Anything else is considered failure.
   - catkin_make -j2