Merge pull request #19533 from owncloud/free-space-inf

Work around INF=0 on some shared hosts

lib/private/helper.php

@@ -742,7 +742,7 @@ class OC_Helper {
 			$freeSpace = max($freeSpace, 0);
 			return $freeSpace;
 		} else {
-			return INF;
+			return (INF > 0)? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188
 		}
 	}