orm: fix offset when order is given too (#5625)

vlib/orm/orm_test.v

@@ -202,6 +202,13 @@ fn test_orm_sqlite() {
 		select from User order age desc limit 1
 	}
 	assert oldest.age == 34
+
+	offs := 1
+
+	second_oldest := sql db {
+		select from User order age desc limit 1 offset offs
+	}
+	assert second_oldest.age == 31
 }
 
 fn test_orm_pg() {

vlib/v/gen/sql.v

@@ -149,6 +149,7 @@ fn (mut g Gen) sql_select_expr(node ast.SqlExpr) {
 	}
 	if node.has_offset {
 		g.write(' OFFSET ')
+		g.sql_side = .right
 		g.expr_to_sql(node.offset_expr)
 	}
 	g.writeln('"));')