--- gtkimageview-1.6.4/src/gtkimagenav.c.orig	2019-05-29 10:25:30.343100700 +0300
+++ gtkimageview-1.6.4/src/gtkimagenav.c	2019-05-29 10:26:01.383144100 +0300
@@ -71,8 +71,9 @@
 gtk_image_nav_get_preview_size (GtkImageNav *nav)
 {
 	GdkPixbuf *pixbuf = gtk_image_view_get_pixbuf (nav->view);
-    if (!pixbuf)
-        return (Size){GTK_IMAGE_NAV_MAX_WIDTH, GTK_IMAGE_NAV_MAX_HEIGHT};
+	if (!pixbuf) {
+		return (Size){GTK_IMAGE_NAV_MAX_WIDTH, GTK_IMAGE_NAV_MAX_HEIGHT};
+	}
 	int img_width = gdk_pixbuf_get_width (pixbuf);
 	int img_height = gdk_pixbuf_get_height (pixbuf);