wined3d: Always unmap buffer objects if ARB_buffer_storage is not supported.

dlls/wined3d/context_gl.c

@@ -2937,7 +2937,8 @@ static void wined3d_bo_gl_unmap(struct wined3d_bo_gl *bo, struct wined3d_context
 {
     const struct wined3d_gl_info *gl_info = context_gl->gl_info;
 
-    if (context_gl->c.device->adapter->mapped_size <= MAX_PERSISTENT_MAPPED_BYTES)
+    if (context_gl->c.d3d_info->persistent_map
+            && context_gl->c.device->adapter->mapped_size <= MAX_PERSISTENT_MAPPED_BYTES)
     {
         TRACE("Not unmapping BO %p.\n", bo);
         return;
@@ -2960,6 +2961,7 @@ static void wined3d_bo_gl_unmap(struct wined3d_bo_gl *bo, struct wined3d_context
     if (bo->b.client_map_count)
     {
         wined3d_device_bo_map_unlock(context_gl->c.device);
+        assert(context_gl->c.d3d_info->persistent_map);
         TRACE("BO %p is still in use by a client thread; not unmapping.\n", bo);
         return;
     }