bug #138 Added a additional check if the posix extension is loaded (jdecoster)

This PR was merged into the 1.0-dev branch.

Discussion
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Added a additional check if the posix extension is loaded

Added a check to prevent a thrown exception when the posix extension is not loaded in php.ini

Commits
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31030e7 Added a additional check if the posix extension is loaded

Author: javiereguiluz

src/Symfony/Installer/NewCommand.php

@@ -364,7 +364,7 @@ protected function generateComposerProjectName()
 
         if (!empty($_SERVER['USERNAME'])) {
             $name = $_SERVER['USERNAME'].'/'.$name;
-        } elseif ($user = posix_getpwuid(posix_getuid())) {
+        } elseif (true === extension_loaded('posix') && $user = posix_getpwuid(posix_getuid())) {
             $name = $user['name'].'/'.$name;
         } elseif (get_current_user()) {
             $name = get_current_user().'/'.$name;