Add two more missing signals

Signed-off-by: Uli Schlachter <psychon@znc.in>

lib/awful/client.lua.in

@@ -836,6 +836,7 @@ end
 -- Register standards signals
 capi.client.add_signal("property::floating_geometry")
 capi.client.add_signal("property::floating")
+capi.client.add_signal("property::dockable")
 
 capi.client.connect_signal("focus", focus.history.add)
 capi.client.connect_signal("unmanage", focus.history.delete)

luaa.c

@@ -817,6 +817,7 @@ luaA_init(xdgHandle* xdg)
     lua_setfield(L, 1, "path"); /* package.path = "concatenated string" */
     lua_pop(L, 1); /* pop "package" */
 
+    signal_add(&global_signals, "debug::error");
     signal_add(&global_signals, "debug::index::miss");
     signal_add(&global_signals, "debug::newindex::miss");
     signal_add(&global_signals, "exit");