Fix: Copy minimizer option 'is_silent' to LinSearchDirection::Options

Change-Id: I23b4c3383cad30033c539ac93883d77c8dd4ba1a

internal/ceres/line_search_minimizer.cc

diff --git a/internal/ceres/line_search_minimizer.cc b/internal/ceres/line_search_minimizer.cc
index be85ceb..fdde1ca 100644
--- a/internal/ceres/line_search_minimizer.cc
+++ b/internal/ceres/line_search_minimizer.cc
@@ -191,6 +191,7 @@
       options.line_search_sufficient_curvature_decrease;
   line_search_options.max_step_expansion =
       options.max_line_search_step_expansion;
+  line_search_options.is_silent = options.is_silent;
   line_search_options.function = &line_search_function;
 
   scoped_ptr<LineSearch>