[libmicrohttpd] 02/02: MemoryPool: realloc: do not move old buffer pointer even if buffer size is zero

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karlson2k pushed a commit to branch master
in repository libmicrohttpd.

commit c2b4cb4a968b8d2dc291cda5ae48f872f63e1256
Author: Evgeny Grin (Karlson2k) <k2k@narod.ru>
AuthorDate: Sat Oct 9 17:25:11 2021 +0300

    MemoryPool: realloc: do not move old buffer pointer even if buffer size is 
zero
---
 src/microhttpd/memorypool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/microhttpd/memorypool.c b/src/microhttpd/memorypool.c
index 0f71ab1b..ffcaab43 100644
--- a/src/microhttpd/memorypool.c
+++ b/src/microhttpd/memorypool.c
@@ -425,7 +425,7 @@ MHD_pool_reallocate (struct MemoryPool *pool,
               (size_t) (((uint8_t*) old) - pool->memory) + old_size <= \
               pool->end - _MHD_RED_ZONE_SIZE);
 
-  if (0 != old_size)
+  if (NULL != old)
   {   /* Have previously allocated data */
     const size_t old_offset = (uint8_t*) old - pool->memory;
     const bool shrinking = (old_size > new_size);

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