x64/LJ_GC64: Fix stack growth in vararg function setup.

Thanks to Vyacheslav Egorov.

diff --git a/src/vm_x64.dasc b/src/vm_x64.dasc
index e7e990ae27faed80952d1ac38e7d446c38cefcb9..bba89aaf1bc57197dcb36f3a91e28e7effa145ea 100644 (file)
--- a/src/vm_x64.dasc
+++ b/src/vm_x64.dasc
@@ -531,7 +531,7 @@ static void build_subroutines(BuildCtx *ctx)
   |  jmp >2
   |
   |->vm_growstack_v:                   // Grow stack for vararg Lua function.
-  |  sub RD, 8
+  |  sub RD, 16                                // LJ_FR2
   |  jmp >1
   |
   |->vm_growstack_f:                   // Grow stack for fixarg Lua function.