[libpeas] Disable building the vala plugin by default.

[Steve FrÃcinaux <sfre src gnome org>]

commit 1031aaeeef282ab2bb65cb6ae48fa4abff453c4d
Author: Steve FrÃcinaux <code istique net>
Date:   Mon Jan 30 19:57:41 2012 +0100

    Disable building the vala plugin by default.
    
    The vala plugin is broken very often due to changes in the vala compiler
    losing backward compatibility. Let's fix this once and for all.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index b41e710..19c023b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -402,7 +402,7 @@ VALA_REQUIRED=0.14.0.22
 AC_ARG_ENABLE([vala],
 	      AS_HELP_STRING([--enable-vala],[Enable Vala support]),
 	      [enable_vala=$enableval],
-	      [enable_vala=auto])
+	      [enable_vala=no])
 
 if test "$enable_vala" = "no"; then
 	found_vala="no (disabled, use --enable-vala to enable)"