Prevent a warning when showing the "About" dialog

gtk-gui.c:about_dialog():
Before assigning a pixel buffer to "logo" check if "image"
has a GTK_IMAGE_PIXBUF storage type.

Prevents the following message if the icon file is missing:
Gtk-CRITICAL **: gtk_image_get_pixbuf: assertion

The message that the file is missing is still shown.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/gtk-gui.c b/gtk-gui.c
index acc881599..0787fed63 100644
--- a/gtk-gui.c
+++ b/gtk-gui.c
@@ -815,7 +815,7 @@ static void about_dialog(GtkWidget *w, gpointer data)
 	if (need_icon) {
 		GtkWidget *image = gtk_image_new_from_file(subsurface_icon_name());
 
-		if (image) {
+		if (gtk_image_get_storage_type(GTK_IMAGE(image)) == GTK_IMAGE_PIXBUF) {
 			logo = gtk_image_get_pixbuf(GTK_IMAGE(image));
 			logo_property = "logo";
 		}