venus: zero out the pipeline handles

We only have to zero out the handles on failure, which is missed. For
pipelines, we can just do it at the beginning for simplicity.

Signed-off-by: Yiwei Zhang <zzyiwei@chromium.org>
Reviewed-by: Chad Versace <chadversary@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18555>

src/virtio/vulkan/vn_pipeline.c

@@ -690,6 +690,8 @@ vn_CreateGraphicsPipelines(VkDevice device,
    bool want_sync = false;
    VkResult result;
 
+   memset(pPipelines, 0, sizeof(*pPipelines) * createInfoCount);
+
    pCreateInfos = vn_fix_graphics_pipeline_create_info(
       dev, createInfoCount, pCreateInfos, alloc, &fixes);
    if (!pCreateInfos)
@@ -741,6 +743,8 @@ vn_CreateComputePipelines(VkDevice device,
    bool want_sync = false;
    VkResult result;
 
+   memset(pPipelines, 0, sizeof(*pPipelines) * createInfoCount);
+
    if (!vn_create_pipeline_handles(dev, createInfoCount, pPipelines, alloc))
       return vn_error(dev->instance, VK_ERROR_OUT_OF_HOST_MEMORY);