gsl-shell.git - gsl-shell

diff --git a/agg-plot/lua-graph.cpp b/agg-plot/lua-graph.cpp
index 609c9722..4be70d35 100644
--- a/agg-plot/lua-graph.cpp
+++ b/agg-plot/lua-graph.cpp

@@ -37,6 +37,8 @@ extern "C" {

static const struct luaL_Reg methods_dummy[] = {{NULL, NULL}};

+pthread_mutex_t agg_mutex[1];

+

void

graph_close_windows (lua_State *L)

{

@@ -46,6 +48,8 @@ graph_close_windows (lua_State *L)

void

register_graph (lua_State *L)

{

+ pthread_mutex_init (agg_mutex, NULL);

+

window_registry_prepare (L);

luaL_register (L, MLUA_GRAPHLIBNAME, methods_dummy);