[Fix] add missing selector_cache declaration

diff --git a/src/plugins/lua/force_actions.lua b/src/plugins/lua/force_actions.lua
index caa03da6497dd71fa890e8267a5b0c631963e3d1..e86892f6a9c945dedb0c8b29e9ac490bcf81c310 100644 (file)
--- a/src/plugins/lua/force_actions.lua
+++ b/src/plugins/lua/force_actions.lua
@@ -23,6 +23,7 @@ end
 
 local E = {}
 local N = 'force_actions'
+local selector_cache = {}
 
 local fun = require "fun"
 local lua_util = require "lua_util"