[gxml] Autotools: fix build

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 10983b4e44cc1e75248e828f56229b8b897f53e8
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Mar 21 13:43:27 2019 -0600

    Autotools: fix build

 examples/c/document_new.c | 2 +-
 po/POTFILES.in            | 1 +
 po/POTFILES.skip          | 2 ++
 3 files changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/examples/c/document_new.c b/examples/c/document_new.c
index 90af43e..2a73215 100644
--- a/examples/c/document_new.c
+++ b/examples/c/document_new.c
@@ -82,7 +82,7 @@ int main () {
     g_object_unref (book);
   }
 
-  str = gxml_dom_element_write_string (GXML_GOM_ELEMENT (root), &error);
+  str = gxml_dom_element_write_string (GXML_GOM_ELEMENT (root), NULL, &error);
   if (error != NULL) {
     printf ("Error writing string from root: %s", error->message);
     exit (1);
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 96a4688..aee7f1f 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -12,6 +12,7 @@ gxml/GomElement.vala
 gxml/GomHashPairedMap.vala
 gxml/GomNode.vala
 gxml/GomObject.vala
+gxml/GXmlParser.vala
 gxml/GomProperty.vala
 gxml/GomSchema.vala
 gxml/GXmlDocument.vala
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 1b846d3..c257013 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -12,6 +12,7 @@ gxml/GomElement.c
 gxml/GomHashPairedMap.c
 gxml/GomNode.c
 gxml/GomObject.c
+gxml/GXmlParser.c
 gxml/GomProperty.c
 gxml/GomSchema.c
 gxml/GXmlDocument.c
@@ -45,6 +46,7 @@ sub/gxml/GomElement.c
 sub/gxml/GomHashPairedMap.c
 sub/gxml/GomNode.c
 sub/gxml/GomObject.c
+sub/gxml/GXmlParser.c
 sub/gxml/GomProperty.c
 sub/gxml/GomSchema.c
 sub/gxml/GXmlDocument.c