gsl-shell.git - gsl-shell

diff --git a/agg-plot/window.cpp b/agg-plot/window.cpp
index c45d3bc8..dbd2a24c 100644
--- a/agg-plot/window.cpp
+++ b/agg-plot/window.cpp

@@ -319,8 +319,13 @@ window_slot_update (lua_State *L)

if (win->status == canvas_window::running)

{

win->draw_slot(slot_id, true);

+ win->unlock();

+ }

+ else

+ {

+ win->unlock();

+ luaL_error (L, "window is not running");

}

- win->unlock();

return 0;

}