win32 cygwin build failure

[Don T. <dt...@to...>]

Just tried compiling a win32 binary using
cygwin and got mysterious compilation
errors.  It was because of a bad definition
in config/config.cyg (which gets copied
into src/config.h for cygwin builds).

Fix follows.

Don Taber

--- config.cyg.orig	2008-02-28 13:42:43.000000000 -0800
+++ config.cyg	2008-03-06 16:53:42.000000000 -0800
@@ -528,7 +528,7 @@
 /* #undef inline */
 
 /* Define to `int' if <sys/types.h> does not define. */
-#define pid_t 1
+/* #define pid_t int */
 
 /* Define to `unsigned' if <sys/types.h> does not define. */
 /* #undef size_t */