SPEC-2513 Fixes to enable w4701 (#1105)

* Some fixes

* more fixes

* fixes for debug

Code/CryEngine/CrySystem/DebugCallStack.cpp

@@ -561,7 +561,7 @@ void DebugCallStack::LogExceptionInfo(EXCEPTION_POINTERS* pex)
 
     if (pex)
     {
-        MINIDUMP_TYPE mdumpValue;
+        MINIDUMP_TYPE mdumpValue = MiniDumpNormal;
         bool bDump = true;
         switch (g_cvars.sys_dump_type)
         {

Code/CryEngine/CrySystem/System.cpp

@@ -66,7 +66,7 @@ LRESULT WINAPI WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
     }
     if (pSystem && !pSystem->IsQuitting())
     {
-        LRESULT result;
+        LRESULT result = 0;
         bool bAny = false;
         for (std::vector<IWindowMessageHandler*>::const_iterator it = pSystem->m_windowMessageHandlers.begin(); it != pSystem->m_windowMessageHandlers.end(); ++it)
         {

Code/CryEngine/CrySystem/SystemInit.cpp

@@ -634,7 +634,7 @@ ICVar* CSystem::attachVariable (const char* szVarName, int* pContainer, const ch
     IConsole* pConsole = GetIConsole();
 
     ICVar* pOldVar = pConsole->GetCVar (szVarName);
-    int nDefault;
+    int nDefault = 0;
     if (pOldVar)
     {
         nDefault = pOldVar->GetIVal();