Fix compile errors when using Xorg 7.1.

From: Peter Osterlund <petero2@telia.com>

Initial patch from VMiklos <vmiklos@frugalware.org>. Somewhat
modified by me.
---

 eventcomm.c |    5 +++++
 ps2comm.h   |    1 +
 psmcomm.c   |    2 ++
 psmcomm.h   |    1 +
 synaptics.c |    1 +
 synproto.h  |    1 +
 6 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/eventcomm.c b/eventcomm.c
index 6f6de7f..1b0f8bc 100644
--- a/eventcomm.c
+++ b/eventcomm.c
@@ -18,6 +18,11 @@
  */
 
 #include "eventcomm.h"
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
 #include "synproto.h"
 #include "synaptics.h"
 #include <xf86.h>
diff --git a/ps2comm.h b/ps2comm.h
index d6f0a25..4a1a051 100644
--- a/ps2comm.h
+++ b/ps2comm.h
@@ -1,6 +1,7 @@
 #ifndef _PS2COMM_H_
 #define _PS2COMM_H_
 
+#include <unistd.h>
 #include <sys/ioctl.h>
 #include "xf86_OSproc.h"
 
diff --git a/psmcomm.c b/psmcomm.c
index e4df42b..257ec13 100644
--- a/psmcomm.c
+++ b/psmcomm.c
@@ -29,6 +29,8 @@
  */
 
 #include "psmcomm.h"
+#include <errno.h>
+#include <string.h>
 #include "synproto.h"
 #include "synaptics.h"
 #include "ps2comm.h"			    /* ps2_print_ident() */
diff --git a/psmcomm.h b/psmcomm.h
index 6d64df6..a3162a2 100644
--- a/psmcomm.h
+++ b/psmcomm.h
@@ -1,6 +1,7 @@
 #ifndef _PSMCOMM_H_
 #define _PSMCOMM_H_
 
+#include <unistd.h>
 #include <sys/ioctl.h>
 #include "freebsd_mouse.h"
 
diff --git a/synaptics.c b/synaptics.c
index 2a17f81..63edebb 100644
--- a/synaptics.c
+++ b/synaptics.c
@@ -59,6 +59,7 @@
  *	Standard Headers
  ****************************************************************************/
 
+#include <unistd.h>
 #include <sys/ioctl.h>
 #include <misc.h>
 #include <xf86.h>
diff --git a/synproto.h b/synproto.h
index 8562a75..ecc4357 100644
--- a/synproto.h
+++ b/synproto.h
@@ -19,6 +19,7 @@
 #ifndef _SYNPROTO_H_
 #define _SYNPROTO_H_
 
+#include <unistd.h>
 #include <sys/ioctl.h>
 #include <xf86Xinput.h>
 #include <xisb.h>