[vala/wip/merge-valadoc] libvaladoc: HashMap doesn't allow null keys

[Rico Tzschichholz <ricotz src gnome org>]

commit 8b4dc3f1f182efc0f86b84476d0ef2c3b4896a35
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Jun 4 12:29:50 2017 +0200

    libvaladoc: HashMap doesn't allow null keys

 libvaladoc/api/package.vala |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/libvaladoc/api/package.vala b/libvaladoc/api/package.vala
index e2d9603..821230e 100644
--- a/libvaladoc/api/package.vala
+++ b/libvaladoc/api/package.vala
@@ -81,11 +81,15 @@ public class Valadoc.Api.Package : Node {
        }
 
        // <version, symbols>
-       private Vala.HashMap<string?, Vala.ArrayList<Symbol>> deprecated;
+       private Vala.HashMap<string, Vala.ArrayList<Symbol>> deprecated;
 
        internal void register_deprecated_symbol (Symbol symbol, string? version) {
                if (deprecated == null) {
-                       deprecated = new Vala.HashMap<string?, Vala.ArrayList<Symbol>> (str_hash, str_equal);
+                       deprecated = new Vala.HashMap<string, Vala.ArrayList<Symbol>> (str_hash, str_equal);
+               }
+
+               if (version == null) {
+                       version = "0xdeadbeef";
                }
 
                Vala.ArrayList<Symbol> list = deprecated.get (version);
@@ -97,9 +101,9 @@ public class Valadoc.Api.Package : Node {
                list.add (symbol);
        }
 
-       public Vala.Map<string?, Vala.Collection<Symbol>> get_deprecated_symbols () {
+       public Vala.Map<string, Vala.Collection<Symbol>> get_deprecated_symbols () {
                if (deprecated == null) {
-                       return new Vala.HashMap<string?, Vala.Collection<Symbol>> (str_hash, str_equal);
+                       return new Vala.HashMap<string, Vala.Collection<Symbol>> (str_hash, str_equal);
                }
 
                return deprecated;