graphics/mesa-devel: unbreak Vulkan on Wayland after 157c391cc1f5

$ vkcube-wayland
Selected GPU 0: Intel(R) HD Graphics 530 (SKL GT2), type: IntegratedGpu
Segmentation fault

(lldb) bt

• thread #1, name = 'vkcube-wayland', stop reason = signal SIGSEGV: invalid address (fault address: 0x40)
  • frame #0: 0x000000082114a4dc libwayland-client.so`wl_proxy_get_version(proxy=0x0000000000000000) at wayland-client.c:2248:16 frame #1: 0x000000082b8543e1 libvulkan_intel.so`wp_tearing_control_manager_v1_get_tearing_control(wp_tearing_control_manager_v1=0x0000000000000000, surface=0x0000245a71e110a0) at tearing-control-v1-client-protocol.h:191:90 frame #2: 0x000000082b852016 libvulkan_intel.so`wsi_wl_surface_create_swapchain(icd_surface=0x0000245a71e32e00, device=0x0000245a71f47400, wsi_device=0x0000245a71eb1ae0, pCreateInfo=0x0000000820617900, pAllocator=0x0000245a71f47440, swapchain_out=0x00000008206178d8) at wsi_common_wayland.c:2277:10 frame #3: 0x000000082b842be4 libvulkan_intel.so`wsi_CreateSwapchainKHR(_device=0x0000245a71f47400, pCreateInfo=0x0000000820617900, pAllocator=0x0000000000000000, pSwapchain=0x0000000820618700) at wsi_common.c:930:22 frame #4: 0x0000000822051bef libvulkan.so.1`terminator_CreateSwapchainKHR + 223 frame #5: 0x000000000021136b vkcube-wayland`demo_prepare_buffers(demo=0x0000000820617c30) at cube.c:1408:11 frame #6: 0x000000000020c679 vkcube-wayland`demo_prepare(demo=0x0000000820617c30) at cube.c:2302:5 frame #7: 0x000000000020af7a vkcube-wayland`main(argc=1, argv=0x0000000820618a38) at cube.c:4592:5 frame #8: 0x000000082356e5fa libc.so.7`__libc_start1(argc=1, argv=0x0000000820618a38, env=0x0000000820618a48, cleanup=<unavailable>, mainX=(vkcube-wayland`main at cube.c:4574)) at libc_start1.c:157:7 frame #9: 0x00000000002085d0 vkcube-wayland`_start at crt1_s.S:83

(lldb) f 2
frame #2: 0x000000082b852016 libvulkan_intel.so`wsi_wl_surface_create_swapchain(icd_surface=0x0000245a71e32e00, device=0x0000245a71f47400, wsi_device=0x0000245a71eb1ae0, pCreateInfo=0x0000000820617900, pAllocator=0x0000245a71f47440, swapchain_out=0x00000008206178d8) at wsi_common_wayland.c:2277:10

2274
2275    if (chain->base.present_mode == VK_PRESENT_MODE_IMMEDIATE_KHR) {
2276       chain->tearing_control =

-> 2277 wp_tearing_control_manager_v1_get_tearing_control(wsi_wl_surface->display->tearing_control_manager,

2278                                                            wsi_wl_surface->surface);
2279       if (!chain->tearing_control) {
2280          result = VK_ERROR_OUT_OF_HOST_MEMORY;

(lldb) p wsi_wl_surface->display->tearing_control_manager
(wp_tearing_control_manager_v1 *) $0 = NULL