Fixed 0003575: Missing german translation for $s_email_assigned_msg.

lang/strings_german.txt

• Translated $s_email_assigned_msg string.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2369 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9