display: display duration from the last coverage update
diff --git a/cmdline.c b/cmdline.c
index 6373a83..92ea1eb 100644
--- a/cmdline.c
+++ b/cmdline.c
@@ -254,6 +254,7 @@
                 .runEndTime = 0,
                 .tmOut = 10,
                 .tmoutVTALRM = false,
+                .lastCovUpdate = time(NULL),
             },
         .cmdline_txt[0] = '\0',
         .useScreen = true,