fix warning in rare case (file doesn't exist in package.xml)

diff --git a/pear/PEAR/Installer.php b/pear/PEAR/Installer.php
index 0c5dbd01b595b4767d4b2aa2b14fe7ae6a5b18c0..632d6a4efc2417ce837a364cc65cc0ee8a6f2bb7 100644 (file)
--- a/pear/PEAR/Installer.php
+++ b/pear/PEAR/Installer.php
@@ -504,7 +504,8 @@ class PEAR_Installer extends PEAR_Common
                             $data[3] = dirname($data[3]);
                         }
                     }
-                    if (!count($this->pkginfo['filelist']['dirtree'])) {
+                    if (isset($this->pkginfo['filelist']['dirtree'])
+                          && !count($this->pkginfo['filelist']['dirtree'])) {
                         unset($this->pkginfo['filelist']['dirtree']);
                     }
                     break;