Fix all uninitialized variable warnings (C26495)

Source/Core/VideoBackends/D3D/D3DPerfQuery.h

@@ -26,7 +26,7 @@ private:
   struct ActiveQuery
   {
     ComPtr<ID3D11Query> query;
-    PerfQueryGroup query_type;
+    PerfQueryGroup query_type{};
   };
 
   void WeakFlush();

Source/Core/VideoBackends/D3D12/D3D12BoundingBox.h

@@ -34,7 +34,7 @@ private:
   ComPtr<ID3D12Resource> m_gpu_buffer;
   ComPtr<ID3D12Resource> m_readback_buffer;
   StreamBuffer m_upload_buffer;
-  DescriptorHandle m_gpu_descriptor;
+  DescriptorHandle m_gpu_descriptor{};
 };
 
 }  // namespace DX12

Source/Core/VideoBackends/D3D12/DescriptorHeapManager.h

@@ -66,7 +66,7 @@ private:
   u32 m_descriptor_increment_size = 0;
   u32 m_current_offset = 0;
 
-  D3D12_CPU_DESCRIPTOR_HANDLE m_heap_base_cpu;
+  D3D12_CPU_DESCRIPTOR_HANDLE m_heap_base_cpu{};
 
   std::unordered_map<SamplerState::StorageType, D3D12_CPU_DESCRIPTOR_HANDLE> m_sampler_map;
 };

Source/Core/VideoBackends/OGL/ProgramShaderCache.h

@@ -59,7 +59,7 @@ struct PipelineProgramKeyHash
 
 struct PipelineProgram
 {
-  PipelineProgramKey key;
+  PipelineProgramKey key{};
   SHADER shader;
   std::atomic_size_t reference_count{1};
   bool binary_retrieved = false;

Source/Core/VideoBackends/Software/SWVertexLoader.h

@@ -25,6 +25,6 @@ protected:
   void SetFormat(u8 attributeIndex, u8 primitiveType);
   void ParseVertex(const PortableVertexDeclaration& vdec, int index);
 
-  InputVertexData m_vertex;
+  InputVertexData m_vertex{};
   SetupUnit m_setup_unit;
 };

Source/Core/VideoBackends/Software/SetupUnit.h

@@ -8,12 +8,12 @@
 
 class SetupUnit
 {
-  u8 m_PrimType;
-  int m_VertexCounter;
+  u8 m_PrimType = 0;
+  int m_VertexCounter = 0;
 
   OutputVertexData m_Vertices[3];
-  OutputVertexData* m_VertPointer[3];
-  OutputVertexData* m_VertWritePointer;
+  OutputVertexData* m_VertPointer[3]{};
+  OutputVertexData* m_VertWritePointer{};
 
   void SetupQuad();
   void SetupTriangle();

Source/Core/VideoBackends/Software/Vec3.h

@@ -11,7 +11,7 @@ class Vec3
 public:
   float x, y, z;
 
-  Vec3() {}
+  Vec3() = default;
   explicit Vec3(float f) { x = y = z = f; }
   explicit Vec3(const float* f)
   {

Source/Core/VideoBackends/Vulkan/CommandBufferManager.h

@@ -120,7 +120,7 @@ private:
   u64 m_completed_fence_counter = 0;
 
   std::array<FrameResources, NUM_COMMAND_BUFFERS> m_frame_resources;
-  u32 m_current_frame;
+  u32 m_current_frame = 0;
 
   // Threaded command buffer execution
   // Semaphore determines when a command buffer can be queued

Source/Core/VideoBackends/Vulkan/VKSwapChain.h

@@ -86,7 +86,7 @@ private:
 
   struct SwapChainImage
   {
-    VkImage image;
+    VkImage image{};
     std::unique_ptr<VKTexture> texture;
     std::unique_ptr<VKFramebuffer> framebuffer;
   };