Fixed compiler warnings from g++-4

src/actions.hpp

@@ -73,6 +73,8 @@ namespace Action {
     public:
         //! Shortcut for an auto pointer.
         typedef std::auto_ptr<Task> AutoPtr;
+        //! Virtual destructor.
+        virtual ~Task() {}
         //! Virtual copy construction.
         AutoPtr clone() const;
         /*!

src/exiv2.cpp

@@ -55,10 +55,10 @@ namespace {
 
     //! List of all command identifiers and corresponding strings
     static const CmdIdAndString cmdIdAndString[] = {
-        add, "add", 
+        { add, "add" },
-        set, "set", 
+        { set, "set" }, 
-        del, "del", 
+        { del, "del" }, 
-        invalidCmdId, "invalidCmd"                  // End of list marker
+        { invalidCmdId, "invalidCmd" }          // End of list marker
     };
 
     // Return a command Id for a command string