Fix build with PostgreSQL 12+.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

src/sql/drivers/psql/qsql_psql.cpp

@@ -147,8 +147,10 @@ static QVariant::Type qDecodePSQLType( int t )
     case FLOAT8OID      :
 	type = QVariant::Double;
 	break;
+#ifdef ABSTIMEOID // PostgreSQL << 12.x
     case ABSTIMEOID     :
     case RELTIMEOID     :
+#endif
     case DATEOID	:
 	type = QVariant::Date;
 	break;