bug #3208723 [import] Fix import of utf-8 XML files.

The string should be already in utf-8.

ChangeLog

@@ -148,6 +148,7 @@
 - [core] Update library PHPExcel to version 1.7.6
 - bug #3206876 [core] Work without mbstring installed.
 - rfe #3196075, patch #3212068 [interface] Add links to variables documentation.
+- bug #3208723 [import] Fix import of utf-8 XML files.
 
 3.3.10.0 (not yet released)
 - patch #3147400 [structure] Aria table size printed as unknown,

libraries/import/xml.php

@@ -63,7 +63,7 @@ unset($data);
  * result in increased performance without the need to
  * alter the code in any way. It's basically a freebee.
  */
-$xml = simplexml_load_string(utf8_encode($buffer), "SimpleXMLElement", LIBXML_COMPACT);
+$xml = simplexml_load_string($buffer, "SimpleXMLElement", LIBXML_COMPACT);
 
 unset($buffer);