fix updating cached mounts that didn't have their mount provider set previously

Signed-off-by: Robin Appelman <robin@icewind.nl>

lib/private/Files/Config/UserMountCache.php

@@ -90,7 +90,12 @@ class UserMountCache implements IUserMountCache {
 
 		$cachedMounts = $this->getMountsForUser($user);
 		if (is_array($mountProviderClasses)) {
-			$cachedMounts = array_filter($cachedMounts, function (ICachedMountInfo $mountInfo) use ($mountProviderClasses) {
+			$cachedMounts = array_filter($cachedMounts, function (ICachedMountInfo $mountInfo) use ($mountProviderClasses, $newMounts) {
+				// for existing mounts that didn't have a mount provider set
+				// we still want the ones that map to new mounts
+				if ($mountInfo->getMountProvider() === '' && isset($newMounts[$mountInfo->getRootId()])) {
+					return true;
+				}
 				return in_array($mountInfo->getMountProvider(), $mountProviderClasses);
 			});
 		}