roi: Render only if selected width and height != 0

1 files changed, 3 insertions, 1 deletions

diff --git a/roi.c b/roi.c
index 3033d0a..1fac018 100644
--- a/roi.c
+++ b/roi.c
@@ -198,7 +198,9 @@ button_release_event(GtkWidget *widget, GdkEventButton *event, gpointer userdata
 		roi->roi_area.height = -roi->roi_area.height;
 	}
 
-	do_roi(roi);
+	if (roi->roi_area.width != 0 &&
+	    roi->roi_area.height != 0)
+		do_roi(roi);
 	roi->previous_draw.width = roi->previous_draw.height = 0;
 
 	gtk_widget_queue_draw(roi->drawing_area);