wined3d: Don't modify existing data if set_private_data fails.

dlls/wined3d/resource.c

@@ -211,7 +211,11 @@ HRESULT CDECL wined3d_resource_set_private_data(struct wined3d_resource *resourc
     TRACE("resource %p, riid %s, data %p, data_size %u, flags %#x.\n",
             resource, debugstr_guid(guid), data, data_size, flags);
 
-    wined3d_resource_free_private_data(resource, guid);
+    if (flags & WINED3DSPD_IUNKNOWN && data_size != sizeof(IUnknown *))
+    {
+        WARN("IUnknown data with size %u, returning WINED3DERR_INVALIDCALL.\n", data_size);
+        return WINED3DERR_INVALIDCALL;
+    }
 
     d = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*d));
     if (!d) return E_OUTOFMEMORY;
@@ -221,12 +225,6 @@ HRESULT CDECL wined3d_resource_set_private_data(struct wined3d_resource *resourc
 
     if (flags & WINED3DSPD_IUNKNOWN)
     {
-        if (data_size != sizeof(IUnknown *))
-        {
-            WARN("IUnknown data with size %u, returning WINED3DERR_INVALIDCALL.\n", data_size);
-            HeapFree(GetProcessHeap(), 0, d);
-            return WINED3DERR_INVALIDCALL;
-        }
         d->ptr.object = (IUnknown *)data;
         d->size = sizeof(IUnknown *);
         IUnknown_AddRef(d->ptr.object);
@@ -242,6 +240,7 @@ HRESULT CDECL wined3d_resource_set_private_data(struct wined3d_resource *resourc
         d->size = data_size;
         memcpy(d->ptr.data, data, data_size);
     }
+    wined3d_resource_free_private_data(resource, guid);
     list_add_tail(&resource->privateData, &d->entry);
 
     return WINED3D_OK;