Bug 482613. Until WinCE wifi support is enabled, do not error out. fixes build bustage on wince

configure.in

@@ -7858,7 +7858,7 @@ if test "$NECKO_WIFI"; then
   elif test "$OS_ARCH" = "WINNT"; then
     NECKO_WIFI=1
   else
-    AC_MSG_ERROR([Necko WiFi scanning not supported on your platform.])
+    AC_MSG_WARN([Necko WiFi scanning not supported on your platform.])
   fi
   AC_SUBST(NECKO_WIFI)