handle versions expire for home storages with unlimited quota

apps/files_versions/lib/storage.php

@@ -676,17 +676,21 @@ class Storage {
 
 			// calculate available space for version history
 			// subtract size of files and current versions size from quota
-			if ($softQuota) {
-				$files_view = new \OC\Files\View('/'.$uid.'/files');
-				$rootInfo = $files_view->getFileInfo('/', false);
-				$free = $quota-$rootInfo['size']; // remaining free space for user
-				if ( $free > 0 ) {
-					$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - ($versionsSize + $offset); // how much space can be used for versions
+			if ($quota >= 0) {
+				if ($softQuota) {
+					$files_view = new \OC\Files\View('/' . $uid . '/files');
+					$rootInfo = $files_view->getFileInfo('/', false);
+					$free = $quota - $rootInfo['size']; // remaining free space for user
+					if ($free > 0) {
+						$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - ($versionsSize + $offset); // how much space can be used for versions
+					} else {
+						$availableSpace = $free - $versionsSize - $offset;
+					}
 				} else {
-					$availableSpace = $free - $versionsSize - $offset;
+					$availableSpace = $quota - $offset;
 				}
 			} else {
-				$availableSpace = $quota - $offset;
+				$availableSpace = PHP_INT_MAX;
 			}
 
 			$allVersions = Storage::getVersions($uid, $filename);