libxml-2.0: Fix xmlGetProp/xmlGetNsProp/xmlGetNoNsProp bindings

Fixes bug 594414.

diff --git a/vapi/libxml-2.0.vapi b/vapi/libxml-2.0.vapi
index 6b0f72e0b23086182c0ef3b0cf95c54e096f2139..5665b50552919665ce37d22b540e2e78c69bb611 100644 (file)
--- a/vapi/libxml-2.0.vapi
+++ b/vapi/libxml-2.0.vapi
@@ -599,16 +599,16 @@ namespace Xml {
                public long get_line_no ();
 
                [CCode (cname = "xmlGetNoNsProp")]
-               public string get_no_ns_prop (string name);
+               public string? get_no_ns_prop (string name);
 
                [CCode (cname = "xmlGetNodePath")]
                public string get_path ();
 
                [CCode (cname = "xmlGetNsProp")]
-               public string get_ns_prop (string name, string ns);
+               public string? get_ns_prop (string name, string ns);
 
                [CCode (cname = "xmlGetProp")]
-               public string get_prop (string name);
+               public string? get_prop (string name);
 
                [CCode (cname = "xmlHasNsProp")]
                public Attr* has_ns_prop (string name, string name_space);