compilation fails on ubuntu

[lrigazio]

please see this issue - there is either something wrong w. openCV or something weird w/ class-structure

/usr/bin/c++ -DSubsense_EXPORTS -I/home/luca/devel/subsense -I/usr/local/include -std=c++11 -Ofast -fPIC -o CMakeFiles/Subsense.dir/Subsense/API.cpp.o -c /home/luca/devel/subsense/Subsense/API.cpp
/home/luca/devel/subsense/Subsense/API.cpp: In function ‘void ss_apply(SSContext*, void*, void*)’:
/home/luca/devel/subsense/Subsense/API.cpp:70:22: error: ‘class BackgroundSubtractorLBSP’ has no member named ‘apply’
ctx->subtractor->apply(input_img, output_img);

[hitsx]

You can comment this line off if you just want C code integration. This line is related to the python bindings.

[Chernfalin]

LBSP is the base class of Susense and LOBSTER, but it has no apply method.
fix the problem just add one line:
virtual void apply(cv::InputArray image, cv::OutputArray fgmask, double learningRateOverride = 0);
in:
BackgroundSubtractorLBSP.h