Apply suggestions from code review

Co-authored-by: Kate <26026535+provokateurin@users.noreply.github.com>
Signed-off-by: invario <67800603+invario@users.noreply.github.com>

Author: invario

lib/private/Preview/Movie.php

@@ -137,7 +137,7 @@ private function getSparseFile(File $file, int $size): string|false {
 		$sparseFile = fopen($absPath, 'w');
 
 		// If video size is less than or equal to $size then just download entire file
-		if (($size) >= $file->getSize()) {
+		if ($size >= $file->getSize()) {
 			stream_copy_to_stream($content, $sparseFile);
 		} else {
 			// Firsts 4 bytes indicate length of 1st atom.
@@ -185,6 +185,8 @@ private function getSparseFile(File $file, int $size): string|false {
 				// Capping it at $size is a precaution against a corrupt/malicious 'moov' atom
 				// Also, if the 'moov' atom size+offset extends past EOF, it is invalid.
 				if (($moovSize === 0) || ($moovSize > $size) || ($moovOffset + $moovSize > $file->getSize())) {
+					fclose($content);
+					fclose($sparseFile);
 					return false;
 				}
 				// Generate new file of same size
@@ -204,6 +206,7 @@ private function getSparseFile(File $file, int $size): string|false {
 			} else {
 				// 'ftyp' atom not found, not a valid MP4/MOV
 				fclose($content);
+				fclose($sparseFile);
 				return false;
 			}
 		}