[gnome-calendar] shell-search: don't crash

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit c5772f994e90a5d5ec7d2648243314b4a92bba80
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Apr 19 16:46:19 2017 -0300

    shell-search: don't crash

 src/gcal-manager.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-manager.c b/src/gcal-manager.c
index cf4995f..c184fcc 100644
--- a/src/gcal-manager.c
+++ b/src/gcal-manager.c
@@ -1232,7 +1232,7 @@ gcal_manager_setup_shell_search (GcalManager             *self,
 {
   g_return_if_fail (GCAL_IS_MANAGER (self));
 
-  if (!self->shell_search_data_model)
+  if (self->shell_search_data_model)
     return;
 
   self->shell_search_data_model = e_cal_data_model_new (submit_thread_job);