silent 'unused param warning

git-svn-id: http://root.cern.ch/svn/root/trunk@33179 27541ba8-7e3a-0410-8455-c3a389f83636

sql/pgsql/src/TPgSQLServer.cxx

@@ -328,12 +328,15 @@ Bool_t TPgSQLServer::HasStatement() const
 }
 
 //______________________________________________________________________________
+#ifdef PG_VERSION_NUM
 TSQLStatement* TPgSQLServer::Statement(const char *sql, Int_t)
+#else
+TSQLStatement* TPgSQLServer::Statement(const char *, Int_t)
+#endif
 {
   // Produce TPgSQLStatement.
 
 #ifdef PG_VERSION_NUM
-
    if (!sql || !*sql) {
       SetError(-1, "no query string specified","Statement");
       return 0;