REDSVM - Possible memory leak

[Anthares101]

Migrating REDSVM to ORCA-Python i detected a memory leak during the execution of the algorithm. The problem looks like is this part of the svm_free_model_content function:

orca/src/Algorithms/libsvm-rank-2.81/svm.cpp

Lines 3416 to 3417 in bd9d682

	if(model_ptr->free_sv && model_ptr->l > 0 && model_ptr->SV != NULL)
	free((void *)(model_ptr->SV[0]));

This code only free the memory of the first SV but not the rest of them. Changing that to:

if(model_ptr->free_sv && model_ptr->l > 0 && model_ptr->SV != NULL){
	for(int i=0;i<model_ptr->l;i++)
			free((void *)(model_ptr->SV[i]));
}

Solved the problem for me.

[javism]

Thanks @Anthares101! Let me test the patch and I'm merge the change.

[javism]

This works in Matlab 2018a but produces a segfault in Octave. I'll take a look.