[vala/0.40] glib-2.0: Computing length once is enough in string.to_utf8()/splice()

[Rico Tzschichholz <ricotz src gnome org>]

commit c93fa393ec2d8deffcf3a1b4a43c4b9b75a683e6
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue Oct 30 09:00:01 2018 +0100

    glib-2.0: Computing length once is enough in string.to_utf8()/splice()

 vapi/glib-2.0.vapi | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index 052fea6fc..e1f6d98f0 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -1455,7 +1455,7 @@ public class string {
                        str_size = ((!)(str)).length;
                }
 
-               string* result = GLib.malloc0 (this.length - (end - start) + str_size + 1);
+               string* result = GLib.malloc0 (string_length - (end - start) + str_size + 1);
 
                char* dest = (char*) result;
 
@@ -1503,9 +1503,10 @@ public class string {
        }
 
        public char[] to_utf8 () {
-               char[] result = new char[this.length + 1];
+               var string_length = this.length;
+               char[] result = new char[string_length + 1];
                result.length--;
-               GLib.Memory.copy (result, this, this.length);
+               GLib.Memory.copy (result, this, string_length);
                return result;
        }