bbunit: fix WANT_TIMING compilation

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/bbunit.c b/libbb/bbunit.c
index 2560144..4c692d5 100644
--- a/libbb/bbunit.c
+++ b/libbb/bbunit.c
@@ -77,7 +77,7 @@
 #if WANT_TIMING
 	gettimeofday(&end, NULL);
 	timeval_diff(&time_spent, &end, &begin);
-	bb_error_msg("Elapsed time %u.%06u seconds"
+	bb_error_msg("Elapsed time %u.%06u seconds",
 			(int)time_spent.tv_sec,
 			(int)time_spent.tv_usec);
 #endif