Use class that actually has the destroy() method in preview generator

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

diff --git a/lib/private/Preview/Generator.php b/lib/private/Preview/Generator.php
index 45e991d551da12895d4269fe85474a5837d0afdd..e47a7e5927c5d461635b3776a96fe25c195a05d0 100644 (file)
--- a/lib/private/Preview/Generator.php
+++ b/lib/private/Preview/Generator.php
@@ -194,7 +194,7 @@ class Generator {
 
                // Free memory being used by the embedded image resource.  Without this the image is kept in memory indefinitely.
                // Garbage Collection does NOT free this memory.  We have to do it ourselves.
-               if ($maxPreviewImage instanceof IImage) {
+               if ($maxPreviewImage instanceof \OC_Image) {
                        $maxPreviewImage->destroy();
                }