winsys/svga: Fix a memory leak
The ioctl.cap_3d member was never freed. Cc: mesa-stable@lists.freedesktop.org Signed-off-by:Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by:
Sinclair Yeh <syeh@vmware.com> Reviewed-by:
Emil Velikov <emil.velikov@collabora.com>