From ca438395855f1e8de844e45b1fd12e2d02b21bfe Mon Sep 17 00:00:00 2001
From: Hugues Delorme <delorme.hugues@fougsys.fr>
Date: Mon, 30 Mar 2015 16:48:05 +0200
Subject: [PATCH] gmio_core: force size to 0 for NULL buffer

---
 src/gmio_core/buffer.c | 2 +-
 src/gmio_core/buffer.h | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/gmio_core/buffer.c b/src/gmio_core/buffer.c
index 9967804..dd72ad9 100644
--- a/src/gmio_core/buffer.c
+++ b/src/gmio_core/buffer.c
@@ -35,7 +35,7 @@ gmio_buffer_t gmio_buffer(void* ptr, size_t size)
 {
     gmio_buffer_t buff;
     buff.ptr = ptr;
-    buff.size = size;
+    buff.size = ptr != NULL ? size : 0;
     buff.deallocate_func = NULL;
     return buff;
 }
diff --git a/src/gmio_core/buffer.h b/src/gmio_core/buffer.h
index ee5dd0c..012bf65 100644
--- a/src/gmio_core/buffer.h
+++ b/src/gmio_core/buffer.h
@@ -40,7 +40,10 @@ typedef struct gmio_buffer gmio_buffer_t;
 
 GMIO_C_LINKAGE_BEGIN
 
-/*! Returns an initialized gmio_buffer object */
+/*! Returns an initialized gmio_buffer object
+ *
+ *  If \p ptr is NULL then gmio_buffer::size is forced to \c 0
+ */
 GMIO_LIB_EXPORT gmio_buffer_t gmio_buffer(void* ptr, size_t size);
 
 /*! Returns a gmio_buffer object allocated with standard malloc() */