[vala] Add missing cheader attribute for luaL_loadfile

[Ben Iofel <beniofel src gnome org>]

commit 4493ff34cf5aacd1c6b41c2f0b2e5d5caefc178e
Author: Peter Lamby <peterlamby web de>
Date:   Tue Jun 2 12:13:14 2015 +0200

    Add missing cheader attribute for luaL_loadfile

 vapi/lua.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapi/lua.vapi b/vapi/lua.vapi
index 1041a0b..dc2e8f5 100644
--- a/vapi/lua.vapi
+++ b/vapi/lua.vapi
@@ -397,7 +397,7 @@ namespace Lua {
                public int load_buffer (char[] buffer, string? name = null);
                [CCode (cname = "luaL_loadstring")]
                public int load_string (string s);
-               [CCode (cname = "luaL_loadfile")]
+               [CCode (cname = "luaL_loadfile", cheader_filename = "lauxlib.h")]
                public int load_file (string filename);
                [CCode (cname = "luaL_dofile", cheader_filename = "lauxlib.h")]
                public bool do_file (string filename);