got Vulkan compiling on Linux again
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1834953003

Review URL: https://codereview.chromium.org/1834953003
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index f9046b7..bfa9597 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -706,7 +706,7 @@
         0,                                           // VkImageCreateFlags
         VK_IMAGE_TYPE_2D,                            // VkImageType
         pixelFormat,                                 // VkFormat
-        { w, h, 1 },                                 // VkExtent3D
+        { (uint32_t) w, (uint32_t) h, 1 },           // VkExtent3D
         1,                                           // mipLevels
         1,                                           // arrayLayers
         vkSamples,                                   // samples