base type 'FilterType *' is not a structure or union

[hawesie]

I get a compilation error here: https://github.com/LCAS/bayestracking/blob/master/include/bayes_tracking/multitracker.h#L197

/Users/nah/code/indigo_ws/src/bayes_tracking/include/bayes_tracking/multitracker.h:197:11: error: member reference base type 'FilterType *' is not a structure or union
    filter.init(initState, initCov);
    ~~~~~~^~~~~
1 warning and 1 error generated.
make[2]: *** [examples/CMakeFiles/simple_2d_tracking.dir/simple_2d_tracking.cpp.o] Error 1
make[1]: *** [examples/CMakeFiles/simple_2d_tracking.dir/all] Error 2
make: *** [all] Error 2
[bayes_tracking] <== '/Users/nah/code/indigo_ws/build/bayes_tracking/build_env.sh /usr/bin/make --jobserver-fds=3,4 -j' failed with return code '2'

Shouldn't it be filter->init(initState, initCov);?