[valadoc] gir-importer: skip <union> elements without ctype-attributes

[Florian Brosch <flobrosch src gnome org>]

commit 89ecb6a91b5bfbe7d1fbf7703b09519079bd6a33
Author: Florian Brosch <flo brosch gmail com>
Date:   Sat Aug 23 06:21:11 2014 +0200

    gir-importer: skip <union> elements without ctype-attributes

 .../importer/girdocumentationimporter.vala         |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/libvaladoc/importer/girdocumentationimporter.vala 
b/src/libvaladoc/importer/girdocumentationimporter.vala
index 45bbf09..e4793f8 100644
--- a/src/libvaladoc/importer/girdocumentationimporter.vala
+++ b/src/libvaladoc/importer/girdocumentationimporter.vala
@@ -812,6 +812,10 @@ public class Valadoc.Importer.GirDocumentationImporter : DocumentationImporter {
        private void parse_union () {
                start_element ("union");
                this.parent_c_identifier = reader.get_attribute ("c:type");
+               if (this.parent_c_identifier == null) {
+                       skip_element ();
+                       return ;
+               }
                next ();
 
                Api.GirSourceComment? comment = parse_symbol_doc ();