fix a typo in prev commit

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/applets/usage_pod.c b/applets/usage_pod.c
index 058e0c8..c1182fd 100644
--- a/applets/usage_pod.c
+++ b/applets/usage_pod.c
@@ -66,7 +66,7 @@
 
 	names = applet_names;
 	usage = usage_messages;
-	while (*names && usage) {
+	while (*names && *usage) {
 		if (*names >= 'a' && *names <= 'z'
 		 && *usage != NOUSAGE_STR[0]
 		) {