Fix PR80183 : _M_color not moved

	PR libstdc++/80183
	* include/bits/stl_tree.h:
	(_Rb_tree_header::_M_move_data(_Rb_tree_header&)): Also save _M_color.

From-SVN: r246483

libstdc++-v3/ChangeLog

+2017-03-26  Markus Trippelsdorf  <markus@trippelsdorf.de>
+
+	PR libstdc++/80183
+	* include/bits/stl_tree.h:
+	(_Rb_tree_header::_M_move_data(_Rb_tree_header&)): Also save _M_color.
+
 2017-03-23  Jonathan Wakely  <jwakely@redhat.com>
 
 	* testsuite/23_containers/array/tuple_interface/

libstdc++-v3/include/bits/stl_tree.h

@@ -192,6 +192,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     void
     _M_move_data(_Rb_tree_header& __from)
     {
+      _M_header._M_color = __from._M_header._M_color;
       _M_header._M_parent = __from._M_header._M_parent;
       _M_header._M_left = __from._M_header._M_left;
       _M_header._M_right = __from._M_header._M_right;