Some applications seem to set **environ to NULL for various reasons. Before we iterate through it we thus need to make sure it is actually set to make sure we don't segfault. Closes rhbz #473080
Signed-off-by: Lennart Poettering <lennart@poettering.net>
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2541 fefdeb5f-60dc-0310-8127-8f9354f1896f