From 7210f994fb3991e624e9afc417db177c9cb1c7dc Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Thu, 3 Dec 2020 10:25:24 +0300
Subject: [PATCH] mdbx-windows: fix `mdbx_realloc()` for nullptr and
 `MDBX_AVOID_CRT=ON`.

Change-Id: I129221186d65254da5b1d84747e5c59d53864b70
---
 src/osal.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/osal.h b/src/osal.h
index a1c8c1f6..be02cf11 100644
--- a/src/osal.h
+++ b/src/osal.h
@@ -181,7 +181,8 @@ static inline void *mdbx_calloc(size_t nelem, size_t size) {
 
 #ifndef mdbx_realloc
 static inline void *mdbx_realloc(void *ptr, size_t bytes) {
-  return LocalReAlloc(ptr, bytes, LMEM_MOVEABLE);
+  return ptr ? LocalReAlloc(ptr, bytes, LMEM_MOVEABLE)
+             : LocalAlloc(LMEM_FIXED, bytes);
 }
 #endif /* mdbx_realloc */