Copy recently added wxGenericValidator fields in Copy().

The pointers added in r68217 must be also initialized when creating a copy of
the validator.

Closes #13304.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@68225 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/valgen.cpp

@@ -121,6 +121,9 @@ bool wxGenericValidator::Copy(const wxGenericValidator& val)
 #if wxUSE_DATETIME
     m_pDateTime = val.m_pDateTime;
 #endif // wxUSE_DATETIME
+    m_pFileName = val.m_pFileName;
+    m_pFloat = val.m_pFloat;
+    m_pDouble = val.m_pDouble;
 
     return true;
 }