Define as 1 (one) as done by autoconf and the command line
	option, e.g. -DICE_t, not as empty.

	This avoids the gcc (3.4.6) warnings:
		../../libICE-1.0.4/src/icetrans.c:29:1: warning: "ICE_t" redefined
		../config.h:38:1: warning: this is the location of the previous definition
		../../libICE-1.0.4/src/icetrans.c:30:1: warning: "TRANS_CLIENT" redefined
		<command line>:6:1: warning: this is the location of the previous definition
		../../libICE-1.0.4/src/icetrans.c:31:1: warning: "TRANS_SERVER" redefined
		<command line>:7:1: warning: this is the location of the previous definition

diff -ur libICE-1.0.4.orig/src/icetrans.c libICE-1.0.4/src/icetrans.c
--- libICE-1.0.4.orig/src/icetrans.c	2006-07-11 22:41:03.000000000 +0200
+++ libICE-1.0.4/src/icetrans.c	2008-10-02 20:52:41.000000000 +0200
@@ -26,8 +26,8 @@
 #include <config.h>
 #endif
 
-#define ICE_t
-#define TRANS_CLIENT
-#define TRANS_SERVER
+#define ICE_t 1
+#define TRANS_CLIENT 1
+#define TRANS_SERVER 1
 
 #include <X11/Xtrans/transport.c>