XML hashing updated

src/xml.cpp

@@ -115,6 +115,11 @@ void WXEXTEND_API wxXmlHashNode(_In_ HCRYPTHASH hash, const wxXmlNode *node)
             // Hash the children.
             for (wxXmlNode *child = node->GetChildren(); child; child = child->GetNext())
                 wxXmlHashNode(hash, child);
-        }
+
+            break;
+        }
+
+    default:
+        wxFAIL_MSG(wxT("unsupported XML node type"));
     }
 }