[wing] Fix typo

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 25bf8c5a5d95dbbeb5964d38c4dafe55b2671cb5
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue May 3 12:35:16 2016 +0200

    Fix typo

 wing/wingutils.h |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/wing/wingutils.h b/wing/wingutils.h
index 9caab94..f5e665d 100644
--- a/wing/wingutils.h
+++ b/wing/wingutils.h
@@ -15,8 +15,8 @@
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef WING_SERVICE_H
-#define WING_SERVICE_H
+#ifndef WING_UTILS_H
+#define WING_UTILS_H
 
 #include <glib.h>
 #include <wing/wingversionmacros.h>
@@ -32,4 +32,4 @@ gboolean     wing_get_version_number   (gint *major,
 
 G_END_DECLS
 
-#endif /* WING_SERVICE_H */
+#endif /* WING_UTILS_H */