Fix for FS#1293

FS#1293 - Systray won't show with margin layout

https://awesome.naquadah.org/bugs/index.php?do=details&task_id=1293&project=1&order=dateopened&sort=desc

systray.c

@@ -325,6 +325,10 @@ systray_update(int base_size, bool horizontal, bool reverse)
 int
 luaA_systray(lua_State *L)
 {
+
+    if(globalconf.systray.parent == NULL)
+        systray_register();
+
     if(lua_gettop(L) != 0)
     {
         size_t bg_len;
@@ -345,9 +349,6 @@ luaA_systray(lua_State *L)
                                          XCB_CW_BACK_PIXEL, config_back);
         }
 
-        if(globalconf.systray.parent == NULL)
-            systray_register();
-
         if(globalconf.systray.parent != w)
             xcb_reparent_window(globalconf.connection,
                                 globalconf.systray.window,