Missing header.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42175 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/app/AppMisc.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2001-2009, Haiku.
+ * Copyright 2001-2011, Haiku, Inc.
  * Distributed under the terms of the MIT License.
  *
  * Authors:
@@ -12,6 +12,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/utsname.h>
+#include <unistd.h>
 
 #include <Entry.h>
 #include <image.h>