Update cache when file size === 0

The conditions were false when $result === 0.
$results here contains the number of written bits.
The correct way of checking for operation success is to check if $result === false

Signed-off-by: Louis Chemineau <louis@chmn.me>

lib/private/Files/View.php

@@ -1191,13 +1191,13 @@ private function basicOperation($operation, $path, $hooks = [], $extraParam = nu
 					throw $e;
 				}
 
-				if ($result && in_array('delete', $hooks)) {
+				if ($result !== false && in_array('delete', $hooks)) {
 					$this->removeUpdate($storage, $internalPath);
 				}
-				if ($result && in_array('write', $hooks, true) && $operation !== 'fopen' && $operation !== 'touch') {
+				if ($result !== false && in_array('write', $hooks, true) && $operation !== 'fopen' && $operation !== 'touch') {
 					$this->writeUpdate($storage, $internalPath);
 				}
-				if ($result && in_array('touch', $hooks)) {
+				if ($result !== false && in_array('touch', $hooks)) {
 					$this->writeUpdate($storage, $internalPath, $extraParam);
 				}