taskd build warnings

gistfile1.txt

/home/dev/tmp/taskd-1.1.0/src/Server.cpp: In member function ‘void Server::daemonize()’:
/home/dev/tmp/taskd-1.1.0/src/Server.cpp:359:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   freopen ("/dev/null", "r", stdin);
                                    ^
/home/dev/tmp/taskd-1.1.0/src/Server.cpp:360:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   freopen ("/dev/null", "w", stdout);
                                     ^
/home/dev/tmp/taskd-1.1.0/src/Server.cpp:361:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]
   freopen ("/dev/null", "w", stderr);
                                     ^
[ 75%] Building CXX object src/CMakeFiles/taskd_executable.dir/status.cpp.o
[ 78%] Building CXX object src/CMakeFiles/taskd_executable.dir/Task.cpp.o
[ 81%] Building CXX object src/CMakeFiles/taskd_executable.dir/text.cpp.o
[ 84%] Building CXX object src/CMakeFiles/taskd_executable.dir/Timer.cpp.o
[ 87%] Building CXX object src/CMakeFiles/taskd_executable.dir/TLSClient.cpp.o
[ 90%] Building CXX object src/CMakeFiles/taskd_executable.dir/TLSServer.cpp.o
[ 93%] Building CXX object src/CMakeFiles/taskd_executable.dir/utf8.cpp.o
[ 96%] Building CXX object src/CMakeFiles/taskd_executable.dir/util.cpp.o
[100%] Building CXX object src/CMakeFiles/taskd_executable.dir/wcwidth6.cpp.o
Linking CXX executable taskd
[100%] Built target taskd_executable