--- ./nx-X11/programs/Xserver/render/renderedge.c.X.original 2015-02-13 14:03:44.792440567 +0100 +++ ./nx-X11/programs/Xserver/render/renderedge.c 2015-02-10 19:13:13.592693823 +0100 @@ -143,6 +143,7 @@ dx = x_bot - x_top; dy = y_bot - y_top; e->dy = dy; + e->dx = 0; if (dy) { if (dx >= 0)