Fix all uninitialized variable warnings (C26495)

Source/Core/Core/Debugger/Debugger_SymbolMap.h

@@ -15,7 +15,7 @@ namespace Dolphin_Debugger
 struct CallstackEntry
 {
   std::string Name;
-  u32 vAddress;
+  u32 vAddress = 0;
 };
 
 bool GetCallstack(std::vector<CallstackEntry>& output);

Source/Core/Core/Debugger/Dump.cpp

@@ -9,7 +9,7 @@
 #include "Common/CommonTypes.h"
 #include "Common/IOFile.h"
 
-CDump::CDump(const std::string& filename) : m_pData(nullptr)
+CDump::CDump(const std::string& filename)
 {
   File::IOFile pStream(filename, "rb");
   if (pStream)

Source/Core/Core/Debugger/Dump.h

@@ -27,9 +27,9 @@ private:
     STRUCTUR_SIZE = 0x2BC
   };
 
-  u8* m_pData;
+  u8* m_pData = nullptr;
 
-  size_t m_size;
+  size_t m_size = 0;
 
   u32 Read32(u32 _pos);
 };

Source/Core/Core/Debugger/RSO.h

@@ -131,7 +131,7 @@ public:
   u32 GetImportsNameTable() const;
 
 private:
-  RSOHeader m_header;
+  RSOHeader m_header{};
   std::string m_name;
   u32 m_address = 0;
 };