[gnome-chess] Use smarter check for *-validate

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 4e15408615f09c812796d3edfca773fc356cddd6
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Nov 5 19:43:35 2013 -0600

    Use smarter check for *-validate

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 53209bd..ac440b9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -33,8 +33,8 @@ PKG_CHECK_MODULES(TEST, [
   gio-2.0
 ])
 
-AC_PATH_PROG(APPDATA_VALIDATE, appdata-validate)
-AC_PATH_PROG(DESKTOP_FILE_VALIDATE, desktop-file-validate)
+AC_PATH_PROG([APPDATA_VALIDATE], [appdata-validate], [/bin/true])
+AC_PATH_PROG([DESKTOP_FILE_VALIDATE], [desktop-file-validate], [/bin/true])
 
 dnl ###########################################################################
 dnl Internationalization