[gnome-builder] vala-pack: avoid strcmp call

[Christian Hergert <chergert src gnome org>]

commit 80fd7fa8f8259306b6594dc758a6730e1fd38550
Author: Christian Hergert <chergert redhat com>
Date:   Sat Nov 11 22:44:26 2017 -0800

    vala-pack: avoid strcmp call

 src/plugins/vala-pack/ide-vala-code-indexer.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/vala-pack/ide-vala-code-indexer.vala 
b/src/plugins/vala-pack/ide-vala-code-indexer.vala
index 72f5761..33aa7ff 100644
--- a/src/plugins/vala-pack/ide-vala-code-indexer.vala
+++ b/src/plugins/vala-pack/ide-vala-code-indexer.vala
@@ -23,7 +23,7 @@ namespace Ide
 {
        bool is_null_or_empty (string? s)
        {
-               return s == null || s == "";
+               return s == null || s[0] == '\0';
        }
 
        public class ValaCodeIndexer : Ide.Object, Ide.CodeIndexer