[libpeas] Assert that no Lua values are leaked during initialize

[Garrett Regier <gregier src gnome org>]

commit 5426f4686bfa6c3d1d656b1b66e8f5bf84847fa4
Author: Garrett Regier <garrettregier gmail com>
Date:   Mon Jan 5 11:39:17 2015 -0800

    Assert that no Lua values are leaked during initialize

 loaders/lua5.1/peas-plugin-loader-lua.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/loaders/lua5.1/peas-plugin-loader-lua.c b/loaders/lua5.1/peas-plugin-loader-lua.c
index bc926a2..11e221b 100644
--- a/loaders/lua5.1/peas-plugin-loader-lua.c
+++ b/loaders/lua5.1/peas-plugin-loader-lua.c
@@ -515,6 +515,9 @@ peas_plugin_loader_lua_initialize (PeasPluginLoader *loader)
   /* Pop lgi's module table */
   lua_pop (L, 1);
 
+  /* Assert that no values were leaked to the stack */
+  g_assert_cmpint (lua_gettop (L), ==, 0);
+
   /* Initially the lock is taken by LGI,
    * release as we are not running Lua code
    */