if a home directory is available for 'user', set env variable $HOME

git-svn-id: https://svn.musicpd.org/mpd/trunk@2426 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/main.c

@@ -268,6 +268,9 @@ void changeToUser(Options * options) {
                         exit(EXIT_FAILURE);
                 }
 
+		if(userpwd->pw_dir) {
+			setenv("HOME", userpwd->pw_dir, 1);
+		}
         }
 }