lua: fix interpreter used after unload of a script

ChangeLog

@@ -24,6 +24,7 @@ http://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 * core: display a warning in case of inconsistency between the options
   weechat.look.save_{config|layout}_on_exit
 * api: add integer return code for functions hook_{signal|hsignal}_send
+* lua: fix interpreter used after unload of a script
 * perl: fix context used after unload of a script
 * python: fix interpreter used after unload of a script
 

src/plugins/lua/weechat-lua.c

@@ -515,6 +515,9 @@ weechat_lua_unload (struct t_plugin_script *script)
     if (interpreter)
         lua_close (interpreter);
 
+    if (lua_current_script)
+        lua_current_interpreter = lua_current_script->interpreter;
+
     (void) weechat_hook_signal_send ("lua_script_unloaded",
                                      WEECHAT_HOOK_SIGNAL_STRING, filename);
     if (filename)