top: fix for 2.4 kernels

diff --git a/procps/top.c b/procps/top.c
index 1d22871..7342dac 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -200,7 +200,7 @@
 			&p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
 			&p_jif->iowait, &p_jif->irq, &p_jif->softirq,
 			&p_jif->steal);
-	if (ret > 4) {
+	if (ret >= 4) {
 		p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
 			+ p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
 		/* procps 2.x does not count iowait as busy time */