ps: fix compile breakage

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/include/libbb.h b/include/libbb.h
index 1694d2c..8ecde5b 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1344,7 +1344,7 @@
 				|| ENABLE_PIDOF
 				|| ENABLE_SESTATUS
 				),
-	IF_SELINUX(PSSCAN_CONTEXT = 1 << 17,)
+	PSSCAN_CONTEXT  = (1 << 17) * ENABLE_SELINUX,
 	PSSCAN_START_TIME = 1 << 18,
 	PSSCAN_CPU      = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
 	PSSCAN_NICE     = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,