cmake: Enforce C4062, C4265, C4388, and C5038

This should match some warnings we treat as errors on gcc and clang,
caching bugs early and reducing the number of instances where we have to
edit commits to make CI happy when developing from Windows.

src/CMakeLists.txt

@@ -45,10 +45,14 @@ if (MSVC)
 
         # Warnings
         /W3
+        /we4062 # enumerator 'identifier' in a switch of enum 'enumeration' is not handled
+        /we4265 # 'class': class has virtual functions, but destructor is not virtual
+        /we4388 # signed/unsigned mismatch
         /we4547 # 'operator' : operator before comma has no effect; expected operator with side-effect
         /we4549 # 'operator1': operator before comma has no effect; did you intend 'operator2'?
         /we4555 # Expression has no effect; expected expression with side-effect
         /we4834 # Discarding return value of function with 'nodiscard' attribute
+        /we5038 # data member 'member1' will be initialized after data member 'member2'
     )
 
     # /GS- - No stack buffer overflow checks