lexer: Include <unistd.h> to ensure 'read' is consistently replaced.

On some platforms, Gnulib #defines read to rpl_read.  The lexer uses
an unreleated function pointer member named 'read' in struct
lex_reader_class.  It doesn't really matter whether this name gets
replaced with rpl_read as long as it always happens consistently.
Adding "#include <unistd.h>" to lexer.h should ensure that.

Reported by Harry Thijssen.

diff --git a/src/language/lexer/lexer.h b/src/language/lexer/lexer.h
index 87b1e2e7233e624487a8f3d97111990d68c2919b..01c4e91501350cba83aaedab7931fc6434d144a1 100644 (file)
--- a/src/language/lexer/lexer.h
+++ b/src/language/lexer/lexer.h
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 1997-9, 2000, 2010, 2011, 2013 Free Software Foundation, Inc.
+   Copyright (C) 1997-9, 2000, 2010, 2011, 2013, 2014 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -19,6 +19,7 @@
 
 #include <stdbool.h>
 #include <stddef.h>
+#include <unistd.h>
 
 #include "data/identifier.h"
 #include "data/variable.h"