[build] minor fixes

src/attr_line.cc

@@ -245,7 +245,7 @@ void attr_line_t::apply_hide()
             sattr.sa_range.length() > 3) {
             struct line_range &lr = sattr.sa_range;
 
-            for_each(sa.begin(), sa.end(), [&] (string_attr &attr) {
+            std::for_each(sa.begin(), sa.end(), [&] (string_attr &attr) {
                 if (attr.sa_type == &view_curses::VC_STYLE &&
                     lr.contains(attr.sa_range)) {
                     attr.sa_type = &SA_REMOVED;

src/textview_curses.cc

@@ -378,7 +378,6 @@ bool textview_curses::handle_mouse(mouse_event &me)
 void textview_curses::textview_value_for_row(vis_line_t row,
                                              attr_line_t &value_out)
 {
-    view_colors &vc = view_colors::singleton();
     bookmark_vector<vis_line_t> &user_marks = this->tc_bookmarks[&BM_USER];
     string_attrs_t &sa = value_out.get_attrs();
     string &str = value_out.get_string();