The last dlib release added a max_iterations parameter to the

svm_c_linear_trainer and svm_c_ekm_trainer objects.  However,
there was a bug which made them only ever do at most 16 iterations,
which is too few to solve many problems.  This has been fixed.

dlib/svm/svm_c_linear_trainer.h

@@ -315,7 +315,7 @@ namespace dlib
         const in_scalar_vector_type& labels,
         const bool be_verbose,
         const scalar_type eps,
-        const unsigned char max_iterations
+        const unsigned long max_iterations
     )
     {
         return oca_problem_c_svm<matrix_type, in_sample_vector_type, in_scalar_vector_type>(