missing include


git-svn-id: https://geuz.org/svn/gmsh/trunk@19703 59c8cabf-10d6-4a28-b43f-3936b85956c4
1400 -> 1440


git-svn-id: https://geuz.org/svn/gmsh/trunk@19704 59c8cabf-10d6-4a28-b43f-3936b85956c4