runtime: revert change to PoisonPtr value

Submitted accidentally in CL 83630044.
Fixes various builds.

TBR=khr
CC=golang-codereviews
https://golang.org/cl/83100047

diff --git a/src/pkg/runtime/malloc.h b/src/pkg/runtime/malloc.h
index 9d478f82c107578be00a17bf48405c71ac8ac663..ec12a3e164b1bd5d2621e1c342fccdc3b0de230a 100644 (file)
--- a/src/pkg/runtime/malloc.h
+++ b/src/pkg/runtime/malloc.h
@@ -637,4 +637,4 @@ void        runtime·memorydump(void);
 int32  runtime·setgcpercent(int32);
 
 // Value we use to mark dead pointers when GODEBUG=gcdead=1.
-#define PoisonPtr ((uintptr)0xf9696969f9696969LL)
+#define PoisonPtr ((uintptr)0x6969696969696969LL)