Another tightening of Win32 typedefs.

src/interfaces/libpq/libpq-int.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2004, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.92 2004/08/30 02:54:41 momjian Exp $
+ * $PostgreSQL: pgsql/src/interfaces/libpq/libpq-int.h,v 1.93 2004/10/05 15:09:41 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -33,7 +33,7 @@
 #include <pthread.h>
 #endif
 
-#if defined(WIN32) && (!defined(ssize_t))
+#ifdef WIN32_CLIENT_ONLY
 typedef int ssize_t;			/* ssize_t doesn't exist in VC (at least
 								 * not VC6) */
 #endif