lavu/vulkan: fix handle type for 32-bit targets

Fixes compilation with clang which errors out on Wint-conversion.
Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
Signed-off-by: Martin Storsjö <martin@martin.st>

libavutil/hwcontext_vulkan.c

@@ -1149,7 +1149,7 @@ static void free_exec_ctx(AVHWFramesContext *hwfc, VulkanExecCtx *cmd)
 
     av_freep(&cmd->queues);
     av_freep(&cmd->bufs);
-    cmd->pool = NULL;
+    cmd->pool = VK_NULL_HANDLE;
 }
 
 static VkCommandBuffer get_buf_exec_ctx(AVHWFramesContext *hwfc, VulkanExecCtx *cmd)

libavutil/vulkan.h

@@ -122,7 +122,11 @@ typedef struct FFVulkanPipeline {
     VkDescriptorSetLayout         *desc_layout;
     VkDescriptorPool               desc_pool;
     VkDescriptorSet               *desc_set;
+#if VK_USE_64_BIT_PTR_DEFINES == 1
     void                         **desc_staging;
+#else
+    uint64_t                      *desc_staging;
+#endif
     VkDescriptorSetLayoutBinding **desc_binding;
     VkDescriptorUpdateTemplate    *desc_template;
     int                           *desc_set_initialized;