Add Lua cleanup on shutdown, to help with memory leak detection. Bug 5575 (https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5575)

From Robert G. Jakabosky

From me: cleanup so that it applies to trunk.

svn path=/trunk/; revision=52798

2 files changed, 8 insertions, 0 deletions

diff --git a/epan/wslua/init_wslua.c b/epan/wslua/init_wslua.c
index c2f81a9a06..afee46d91c 100644
--- a/epan/wslua/init_wslua.c
+++ b/epan/wslua/init_wslua.c
@@ -486,6 +486,13 @@ int wslua_init(register_cb cb, gpointer client_data) {
     return 0;
 }
 
+int wslua_cleanup(void) {
+    /* cleanup lua */
+    lua_close(L);
+    L = NULL;
+    return 0;
+}
+
 lua_State* wslua_state(void) { return L; }
 
 /*
diff --git a/epan/wslua/wslua.h b/epan/wslua/wslua.h
index 6a298233b0..7eb4a39378 100644
--- a/epan/wslua/wslua.h
+++ b/epan/wslua/wslua.h
@@ -457,6 +457,7 @@ extern void clear_outstanding_TreeItem(void);
 extern void wslua_print_stack(char* s, lua_State* L);
 
 extern int wslua_init(register_cb cb, gpointer client_data);
+extern int wslua_cleanup(void);
 
 extern tap_extractor_t wslua_get_tap_extractor(const gchar* name);
 extern int wslua_set_tap_enums(lua_State* L);