fixed bogus undefined symbols with hpux compiler

src/ca/netWriteNotifyIO.cpp

@@ -81,6 +81,13 @@ nciu & netWriteNotifyIO::channel () const
     return this->chan;
 }
 
+void * netWriteNotifyIO::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 netWriteNotifyIO::operator delete ( void * )
 {
     // Visual C++ .net appears to require operator delete if