cmd/gc: replace NULL by nil

In CL 4050, NULL was used instead of nil.
However, Plan 9 doesn't declare NULL.

Change-Id: I8295a3102509a1ce417278f23a37cbf65938cce1
Reviewed-on: https://go-review.googlesource.com/4814
Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>

diff --git a/src/cmd/gc/walk.c b/src/cmd/gc/walk.c
index 0e69f88b66268c033aec6bd7c0d13213e7432f32..50dae8ca681ce2b78599a9d3f6d645e6111cbb29 100644 (file)
--- a/src/cmd/gc/walk.c
+++ b/src/cmd/gc/walk.c
@@ -634,7 +634,7 @@ walkexpr(Node **np, NodeList **init)
 
                        // Append captured variables to argument list.
                        n->list = concat(n->list, n->left->enter);
-                       n->left->enter = NULL;
+                       n->left->enter = nil;
                        // Replace OCLOSURE with ONAME/PFUNC.
                        n->left = n->left->closure->nname;
                        // Update type of OCALLFUNC node.