getTracksFromGPX($content): silence libxml internal errors

Signed-off-by: umgfoin <[email protected]>

Author: umgfoin

lib/Service/GeophotoService.php

@@ -352,6 +352,7 @@ private function loadTimeorderedPointSets(string $userId, $folder = null, bool $
 	 */
 	private function getTracksFromGPX($content): array {
 		$tracks = [];
+		libxml_use_internal_errors(false);
 		$gpx = simplexml_load_string($content);
 		foreach ($gpx->trk as $trk) {
 			$tracks[] = $trk;