[evolution] configure: Fix typo in enable_spamassassin variable usage

[Priit Laes <plaes src gnome org>]

commit 5727d74fb54a1c76922099d023a182418c3bac70
Author: Priit Laes <plaes plaes org>
Date:   Sun Feb 23 22:42:00 2014 +0200

    configure: Fix typo in enable_spamassassin variable usage

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 53ffd3d..c94b00d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -973,7 +973,7 @@ dnl ************************************
 AC_ARG_ENABLE([spamassassin],
        [AS_HELP_STRING([--enable-spamassassin],
        [enable spam filtering using SpamAssassin (default=yes)])],
-       [enable spamassassin=$enableval], [enable_spamassassin=yes])
+       [enable_spamassassin=$enableval], [enable_spamassassin=yes])
 AC_MSG_CHECKING([if SpamAssassin support is enabled])
 AC_MSG_RESULT([$enable_spamassassin])
 msg_spamassassin="$enable_spamassassin"