[gnome-photos] preview-nav-buttons: Fix typo

[Debarshi Ray <debarshir src gnome org>]

commit 88b7c622480ac7433094e259306f1054a80231cb
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Dec 6 12:01:05 2016 +0100

    preview-nav-buttons: Fix typo

 src/photos-preview-nav-buttons.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/photos-preview-nav-buttons.h b/src/photos-preview-nav-buttons.h
index 46a1619..de3351e 100644
--- a/src/photos-preview-nav-buttons.h
+++ b/src/photos-preview-nav-buttons.h
@@ -38,9 +38,9 @@ G_BEGIN_DECLS
   (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
    PHOTOS_TYPE_PREVIEW_NAV_BUTTONS, PhotosPreviewNavButtons))
 
-#define PHOTOS_IS_PREVIEW_VIEW(obj) \
+#define PHOTOS_IS_PREVIEW_NAV_BUTTONS(obj) \
   (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
-   PHOTOS_TYPE_PREVIEW_VIEW))
+   PHOTOS_TYPE_PREVIEW_NAV_BUTTONS))
 
 typedef struct _PhotosPreviewNavButtons      PhotosPreviewNavButtons;
 typedef struct _PhotosPreviewNavButtonsClass PhotosPreviewNavButtonsClass;