fix: Initialize all handle which will free in destructor

Fix the random crash caused by free a non‑null garbage value.
This patch is the improvement of PR:#1453

Signed-off-by: Ryan Zhang <[email protected]>

Author: ryanKkaiii

samples/api/timestamp_queries/timestamp_queries.h

@@ -64,17 +64,17 @@ class TimestampQueries : public ApiVulkanSample
 
 	struct
 	{
-		VkPipeline skybox;
-		VkPipeline reflect;
-		VkPipeline composition;
-		VkPipeline bloom[2];
+		VkPipeline skybox = VK_NULL_HANDLE;
+		VkPipeline reflect = VK_NULL_HANDLE;
+		VkPipeline composition = VK_NULL_HANDLE;
+		VkPipeline bloom[2] = { VK_NULL_HANDLE };
 	} pipelines;
 
 	struct
 	{
-		VkPipelineLayout models;
-		VkPipelineLayout composition;
-		VkPipelineLayout bloom_filter;
+		VkPipelineLayout models = VK_NULL_HANDLE;
+		VkPipelineLayout composition = VK_NULL_HANDLE;
+		VkPipelineLayout bloom_filter = VK_NULL_HANDLE;
 	} pipeline_layouts;
 
 	struct
@@ -87,17 +87,17 @@ class TimestampQueries : public ApiVulkanSample
 
 	struct
 	{
-		VkDescriptorSetLayout models;
-		VkDescriptorSetLayout composition;
-		VkDescriptorSetLayout bloom_filter;
+		VkDescriptorSetLayout models = VK_NULL_HANDLE;
+		VkDescriptorSetLayout composition = VK_NULL_HANDLE;
+		VkDescriptorSetLayout bloom_filter = VK_NULL_HANDLE;
 	} descriptor_set_layouts;
 
 	// Framebuffer for offscreen rendering
 	struct FrameBufferAttachment
 	{
-		VkImage        image;
-		VkDeviceMemory mem;
-		VkImageView    view;
+		VkImage        image = VK_NULL_HANDLE;
+		VkDeviceMemory mem = VK_NULL_HANDLE;
+		VkImageView    view = VK_NULL_HANDLE;
 		VkFormat       format;
 		void           destroy(VkDevice device)
 		{
@@ -109,20 +109,20 @@ class TimestampQueries : public ApiVulkanSample
 	struct FrameBuffer
 	{
 		int32_t               width, height;
-		VkFramebuffer         framebuffer;
+		VkFramebuffer         framebuffer = VK_NULL_HANDLE;
 		FrameBufferAttachment color[2];
 		FrameBufferAttachment depth;
-		VkRenderPass          render_pass;
-		VkSampler             sampler;
+		VkRenderPass          render_pass = VK_NULL_HANDLE;
+		VkSampler             sampler = VK_NULL_HANDLE;
 	} offscreen;
 
 	struct
 	{
 		int32_t               width, height;
-		VkFramebuffer         framebuffer;
+		VkFramebuffer         framebuffer = VK_NULL_HANDLE;
 		FrameBufferAttachment color[1];
-		VkRenderPass          render_pass;
-		VkSampler             sampler;
+		VkRenderPass          render_pass = VK_NULL_HANDLE;
+		VkSampler             sampler = VK_NULL_HANDLE;
 	} filter_pass;
 
 	std::vector<std::string> object_names;