[evolution-data-server] Minor compiler warning fix (change #if to #ifdef)

[Milan Crha <mcrha src gnome org>]

commit e5f28da0cf6fd5322004c24854d622dba3bd7ebf
Author: Milan Crha <mcrha redhat com>
Date:   Tue Jun 28 11:46:39 2011 +0200

    Minor compiler warning fix (change #if to #ifdef)

 .../backends/google/e-book-backend-google.c        |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/addressbook/backends/google/e-book-backend-google.c b/addressbook/backends/google/e-book-backend-google.c
index c9da00a..428bb52 100644
--- a/addressbook/backends/google/e-book-backend-google.c
+++ b/addressbook/backends/google/e-book-backend-google.c
@@ -603,7 +603,7 @@ get_new_contacts (EBookBackend *backend)
 		(GDataQueryProgressCallback) (last_updated ?
 			process_subsequent_entry : process_initial_entry),
 		backend,
-#if HAVE_LIBGDATA_0_9
+#ifdef HAVE_LIBGDATA_0_9
 		(GDestroyNotify) NULL,
 #endif
 		(GAsyncReadyCallback) get_new_contacts_cb,