Alexandre Julliard : kernelbase: Don't round thread stack guaranteed size when it is zero.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b1bb4f84e244d141f7f17cdb6497ce645fd56015
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=b1bb4f84e244d141f7f17cdb6497ce645fd56015

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Wed Sep 18 17:52:07 2019 +0200

kernelbase: Don't round thread stack guaranteed size when it is zero.

Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/kernelbase/thread.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/kernelbase/thread.c b/dlls/kernelbase/thread.c
index e16062016a..30e9a2e09b 100644
--- a/dlls/kernelbase/thread.c
+++ b/dlls/kernelbase/thread.c
@@ -505,7 +505,7 @@ BOOL WINAPI DECLSPEC_HOTPATCH SetThreadStackGuarantee( ULONG *size )
     ULONG new_size = (*size + 4095) & ~4095;
 
     /* at least 2 pages on 64-bit */
-    if (sizeof(void *) > sizeof(int)) new_size = max( new_size, 8192 );
+    if (sizeof(void *) > sizeof(int) && new_size) new_size = max( new_size, 8192 );
 
     *size = prev_size;
     if (new_size >= (char *)NtCurrentTeb()->Tib.StackBase - (char *)NtCurrentTeb()->DeallocationStack)