include unistd.h -- fix by Daniel Serpell

git-svn-id: svn://svn.cc65.org/cc65/trunk@4490 b7a2c559-68d2-44c3-8de9-860c34a00d81

testcode/lib/ft.c

@@ -20,6 +20,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <conio.h>
+#include <unistd.h>
 
 extern int getsp(void);  /* is provided in getsp.s */
 

testcode/lib/posixio-test.c

@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <fcntl.h>
-
+#include <unistd.h>
 
 
 int Open (const char* Name, int Flags)