open/close/etc. are defined in unistd.h, GCC 4.7 is stricter in this and
breaks the build, bug #413859.  Upstream already applied a similar
change for another issue, so next release should be fine.

--- uncrustify-0.59/src/uncrustify.cpp
+++ uncrustify-0.59/src/uncrustify.cpp
@@ -24,6 +24,9 @@
 #include <cstdlib>
 #include <cstring>
 #include <cerrno>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
 #include <fcntl.h>
 #include "unc_ctype.h"
 #ifdef HAVE_SYS_STAT_H