fixed bogus undefined symbols with hpux compiler

src/ca/syncGroupWriteNotify.cpp

@@ -86,6 +86,13 @@ void syncGroupWriteNotify::show ( unsigned level ) const
     }
 }
 
+void * syncGroupWriteNotify::operator new ( size_t )
+{
+    // The HPUX compiler seems to require this even though no code
+    // calls it directly
+    throw std::logic_error ( "why is the compiler calling private operator new" );
+}
+
 void syncGroupWriteNotify::operator delete ( void * p )
 {
     // Visual C++ .net appears to require operator delete if