vulkan : fix 32-bit builds (ggml/1313)

The pipeline member can be cast to VkPipeline.
This is a VkPipeline_T* on 64 bit but a uint64_t on 32 bit.
Cf. VK_DEFINE_NON_DISPATCHABLE_HANDLE documentation.

ggml/src/ggml-vulkan/ggml-vulkan.cpp

@@ -1341,7 +1341,7 @@ static void ggml_vk_create_pipeline_func(vk_device& device, vk_pipeline& pipelin
         vk::DebugUtilsObjectNameInfoEXT duoni;
         duoni.objectType = vk::ObjectType::ePipeline;
         duoni.pObjectName = pipeline->name.c_str();
-        duoni.objectHandle = reinterpret_cast<uint64_t>(static_cast<VkPipeline_T*>(pipeline->pipeline));
+        duoni.objectHandle = /*reinterpret_cast*/(uint64_t)(static_cast<VkPipeline>(pipeline->pipeline));
         vk_instance.pfn_vkSetDebugUtilsObjectNameEXT(device->device, &static_cast<VkDebugUtilsObjectNameInfoEXT &>(duoni));
     }