[vala/staging: 25/25] FIXME Fix build with valac < 0.23.1

[Rico Tzschichholz <ricotz src gnome org>]

commit b0313062f333eb9f88623db8693394cc12c06cd0
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Apr 1 11:42:24 2020 +0200

    FIXME Fix build with valac < 0.23.1

 vala/valaparser.vala | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/vala/valaparser.vala b/vala/valaparser.vala
index 1eba3bd9c..92b51bcda 100644
--- a/vala/valaparser.vala
+++ b/vala/valaparser.vala
@@ -378,6 +378,9 @@ public class Vala.Parser : CodeVisitor {
                context = source_reference.file.context;
                from_string_reference = source_reference;
                this.replacements = (owned) replacements;
+#if !VALA_0_24
+               replacements.length = 0;
+#endif
                replacement_index = 0;
 
                scanner = new Scanner.from_string (str, source_reference.file);
@@ -410,6 +413,9 @@ public class Vala.Parser : CodeVisitor {
                context = source_reference.file.context;
                from_string_reference = source_reference;
                this.replacements = (owned) replacements;
+#if !VALA_0_24
+               replacements.length = 0;
+#endif
                replacement_index = 0;
 
                scanner = new Scanner.from_string (str, source_reference.file);