Ticket #1183: fix-xmlfield-firstchild-on-assembling.diff

opensync/xmlformat/opensync_xmlfield.c

@@ -65 +65 @@
                 xmlfield->prev = parent->child;
                 if (xmlfield->prev)
                         xmlfield->prev->next = xmlfield;
-                parent->child = xmlfield;
+                if (!parent->child) // This breaks xmlformat_is_sorted testcase
+                        parent->child = xmlfield;
         }