[PATCH] wined3d: Set a valid map pointer in adapter_gl_alloc_bo() if possible.

[Henri Verbeet]

From: Zebediah Figura <zfigura at codeweavers.com>

Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
---
v2: Adjusted commit message, otherwise unmodified.
This supersedes patch 227319.

 dlls/wined3d/adapter_gl.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/dlls/wined3d/adapter_gl.c b/dlls/wined3d/adapter_gl.c
index cb0c34823aa..4e93e25452d 100644
--- a/dlls/wined3d/adapter_gl.c
+++ b/dlls/wined3d/adapter_gl.c
@@ -4646,6 +4646,18 @@ static bool adapter_gl_alloc_bo(struct wined3d_device *device, struct wined3d_re
             return false;
         }
 
+        if (bo_gl->memory)
+        {
+            struct wined3d_allocator_chunk_gl *chunk = wined3d_allocator_chunk_gl(bo_gl->memory->chunk);
+
+            wined3d_allocator_chunk_gl_lock(chunk);
+
+            if ((bo_gl->b.map_ptr = chunk->c.map_ptr))
+                ++chunk->c.map_count;
+
+            wined3d_allocator_chunk_gl_unlock(chunk);
+        }
+
         addr->buffer_object = &bo_gl->b;
         addr->addr = NULL;
 
-- 
2.30.2