Fixed bogus undefined symbols with hpux aCC compiler.

src/db/dbChannelIO.cpp

@@ -135,6 +135,13 @@ void * dbChannelIO::operator new ( size_t size,
     return freeList.allocate ( size );
 }
 
+void * dbChannelIO::operator new ( size_t ) // X aCC 361
+{
+    // 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" );
+}
+
 #ifdef CXX_PLACEMENT_DELETE
 void dbChannelIO::operator delete ( void *pCadaver, 
     tsFreeList < dbChannelIO > & freeList ) epicsThrows(())