[master] explicitly declare/define virtual destructor for ZoneFinder::Context.

This will fix a build error on some systems, and is a good practice anyway.
Also fix a minor wording error in a comment.

diff --git a/src/lib/datasrc/zone.h b/src/lib/datasrc/zone.h
index 0a58312311a97b39e1f85baa89e1dd13e08fee96..361a03a605107e78dcaa7da3228663781e1b92c6 100644 (file)
--- a/src/lib/datasrc/zone.h
+++ b/src/lib/datasrc/zone.h
@@ -197,6 +197,9 @@ public:
             all_set_(all_set)
         {}
 
+        /// \brief The destructor.
+        virtual ~Context() {}
+
         const Result code;
         const isc::dns::ConstRRsetPtr rrset;
 
@@ -257,7 +260,7 @@ public:
             const std::vector<isc::dns::RRType>& requested_types,
             std::vector<isc::dns::ConstRRsetPtr>& result)
         {
-            // Perform common checks, and delegate the process the default
+            // Perform common checks, and delegate the process to the default
             // or specialized implementation.
             if (code != SUCCESS && code != DELEGATION) {
                 return;