Add missing package dependency
Fixes issue #408
diff --git a/contrib/packages/deb/ubuntu-xenial/debian/control b/contrib/packages/deb/ubuntu-xenial/debian/control
index 626efee..c063496 100644
--- a/contrib/packages/deb/ubuntu-xenial/debian/control
+++ b/contrib/packages/deb/ubuntu-xenial/debian/control
@@ -30,7 +30,7 @@
Package: xtigervncviewer
Architecture: any
Provides: vncviewer, vnc-viewer
-Depends: libc6, libexpat1, libfontconfig1, libfreetype6, libgcc1, libgnutls30, libjpeg-turbo8, libp11-kit0, libpng12-0, libstdc++6, libtasn1-3-bin, libx11-6, libxau6, libxcb1, libxdmcp6, libxext6, libxft2, libxrender1, zlib1g, libglu1-mesa, libxcursor1, libxinerama1, libxfixes3, libfltk1.3
+Depends: libc6, libexpat1, libfontconfig1, libfreetype6, libgcc1, libgnutls30, libjpeg-turbo8, libp11-kit0, libpng12-0, libstdc++6, libtasn1-3-bin, libx11-6, libxau6, libxcb1, libxdmcp6, libxext6, libxft2, libxrender1, zlib1g, libglu1-mesa, libxcursor1, libxinerama1, libxfixes3, libfltk1.3, libfltk-images1.3
Recommends: xfonts-base
Suggests: tigervncserver, ssh
Description: virtual network computing client software for X