Fixed build without doxygen

9 jobs for master in 82 minutes and 40 seconds
Status Name Job ID Coverage
  Test
passed clang-c++11-Qt4 #5857
Linux MultiThreads

00:07:02

passed clang-c++11-Qt5 #5861
Linux MultiThreads

00:09:19

passed clang-c++98-Qt4 #5859
Linux MultiThreads

00:05:48

passed clang-c++98-Qt5 #5863
Linux MultiThreads

00:07:17

passed cppcheck #5864
Linux MultiThreads

00:35:31

passed gcc-c++11-Qt4 #5856
Linux

00:04:36

passed gcc-c++11-Qt5 #5860
Linux

00:06:02

passed gcc-c++98-Qt4 #5858
Linux

00:03:06

passed gcc-c++98-Qt5 #5862
Linux

00:03:55