validation: make CScriptCheck and prevector swap member functions noexcept

Reason:
A swap must not fail; when a class has a swap member function, it should be declared noexcept.
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c84-a-swap-function-must-not-fail

1 files changed, 2 insertions, 1 deletions

diff --git a/src/prevector.h b/src/prevector.h
index aa20efaaa7..830b31e315 100644
--- a/src/prevector.h
+++ b/src/prevector.h
@@ -458,7 +458,8 @@ public:
         return *item_ptr(size() - 1);
     }
 
-    void swap(prevector<N, T, Size, Diff>& other) {
+    void swap(prevector<N, T, Size, Diff>& other) noexcept
+    {
         std::swap(_union, other._union);
         std::swap(_size, other._size);
     }