sentinel

src/cmd/bc.y

diff --git a/src/cmd/bc.y b/src/cmd/bc.y
index bdf8fc0..43021b9 100644
--- a/src/cmd/bc.y
+++ b/src/cmd/bc.y
@@ -981,5 +981,5 @@
 	dup(p[0], 0);
 	close(p[0]);
 	close(p[1]);
-	execlp("dc", "dc", 0);
+	execlp("dc", "dc", (char*)0);
 }