lefty: make a unix #include of unistd.h unconditional

On unices, it is fine to assume the existence of unistd.h.

Gitlab: #2204

diff --git a/cmd/lefty/os/unix/io.c b/cmd/lefty/os/unix/io.c
index afd3bbd8403ed804377720aeb849aa601c0b9a83..3b39a147f6677293d55e6737c5737950a90ffa8c 100644 (file)
--- a/cmd/lefty/os/unix/io.c
+++ b/cmd/lefty/os/unix/io.c
@@ -35,6 +35,7 @@
 #define FORK fork
 #endif
 #include <netdb.h>
+#include <unistd.h>
 
 /* AI_NUMERICSERV as a value for the `ai_flags' member
  * of `struct addrinfo' of header <netdb.h> has only
@@ -56,10 +57,6 @@
 #define AI_NUMERICSERV 0
 #endif
 
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-
 io_t *iop;
 int ion;