util: virportallocator: add includes

Include both virutil.h and unistd.h.

Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>

src/util/virportallocator.c

@@ -21,6 +21,8 @@
 
 #include <config.h>
 
+#include <unistd.h>
+
 #include "virsocket.h"
 #include "viralloc.h"
 #include "virbitmap.h"
@@ -29,6 +31,7 @@
 #include "virerror.h"
 #include "virfile.h"
 #include "virstring.h"
+#include "virutil.h"
 
 #define VIR_FROM_THIS VIR_FROM_NONE