[PATCH 4/4] d3d8: Do not release the wined3d mutex in d3d8_device_upload_sysmem_index_buffer().

[Zebediah Figura]

From: Zebediah Figura

Spotted by Henri Verbeet.

This fixes a regression introduced by fc0f0090f6ba24cc68d2b04503977fbcebc1f96d.
---
 dlls/d3d8/device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/d3d8/device.c b/dlls/d3d8/device.c
index d6a5349367b..b8193a83cbc 100644
--- a/dlls/d3d8/device.c
+++ b/dlls/d3d8/device.c
@@ -2477,7 +2477,7 @@ static HRESULT d3d8_device_upload_sysmem_index_buffer(struct d3d8_device *device
     wined3d_box_set(&box, src_offset, 0, buffer_size, 1, 0, 1);
     if (FAILED(hr = wined3d_resource_map(index_buffer, 0, &map_desc, &box, WINED3D_MAP_READ)))
     {
-        wined3d_mutex_unlock();
+        ERR("Failed to map index buffer, hr %#x.\n", hr);
         return hr;
     }
     wined3d_streaming_buffer_upload(device->wined3d_device, &device->index_buffer,