roi: Fail if invalid or no image is given

1 files changed, 4 insertions, 0 deletions

diff --git a/roi.c b/roi.c
index 9192472..eac03d9 100644
--- a/roi.c
+++ b/roi.c
@@ -237,7 +237,11 @@ main(int argc, char *argv[])
 
 	gtk_init(&argc, &argv);
 
+	if (argc < 2)
+		exit(EXIT_FAILURE);
 	roi.input = gdk_pixbuf_new_from_file(argv[1], NULL);
+	if (!roi.input)
+		exit(EXIT_FAILURE);
 	roi.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 	roi.drawing_area = gtk_drawing_area_new();