Minor security vulnerability found for Unix-like systems

[sierdzio]

Hi,

a new and important security message was just posted on Qt-Announce by Thiago. Here is a "link":http://lists.qt-project.org/pipermail/announce/2013-February/000023.html.

Affected are all versions before 5.0.1. Fix will be included in next 4.7.x and 4.8.x releases, too.