[gnome-builder] vala-pack: add workaround for string arrays

[Christian Hergert <chergert src gnome org>]

commit 6c64b4215a4649d115887f3b5879881b11965195
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jan 18 08:02:59 2018 -0800

    vala-pack: add workaround for string arrays
    
    Vala currently doesn't handle the null-terminated array of strings
    being passed down correctly (const gchar * const *). This is a workaround
    for it temporarily.

 src/plugins/vala-pack/ide-vala-code-indexer.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/vala-pack/ide-vala-code-indexer.vala 
b/src/plugins/vala-pack/ide-vala-code-indexer.vala
index 5627ee17f..95b01e106 100644
--- a/src/plugins/vala-pack/ide-vala-code-indexer.vala
+++ b/src/plugins/vala-pack/ide-vala-code-indexer.vala
@@ -29,7 +29,7 @@ namespace Ide
        public class ValaCodeIndexer : Ide.Object, Ide.CodeIndexer
        {
                public async Ide.CodeIndexEntries index_file_async (GLib.File file,
-                                                                   string[]? build_flags,
+                                                                   [CCode (array_length = false, 
array_null_terminated = true)] string[]? build_flags,
                                                                    GLib.Cancellable? cancellable)
                        throws GLib.Error
                {