[evolution-ews] Fix some compiler warnings reported by Clang in the test code

[Milan Crha <mcrha src gnome org>]

commit ae544e35a6bf26d757a181d0c0a385b24ee20f2b
Author: Milan Crha <mcrha redhat com>
Date:   Wed May 22 18:57:14 2019 +0200

    Fix some compiler warnings reported by Clang in the test code

 tests/ews-test-camel.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/tests/ews-test-camel.c b/tests/ews-test-camel.c
index 7aedbcbe..32a6345e 100644
--- a/tests/ews-test-camel.c
+++ b/tests/ews-test-camel.c
@@ -446,8 +446,8 @@ test_move_folder_to_msgfolderroot (gconstpointer user_data)
        gboolean moved_to_msgfolderroot = FALSE;
        GError *error = NULL;
        GSList *folder_ids = NULL;
-       GSList *folders1;
-       GSList *folders2;
+       GSList *folders1 = NULL;
+       GSList *folders2 = NULL;
        EEwsFolder *folder1;
        EEwsFolder *folder2;
        EwsFolderId *msgfolderroot;
@@ -517,7 +517,7 @@ test_move_folder_to_folder_that_has_subfolder_with_the_same_name (gconstpointer
        gboolean retval = TRUE;
        gboolean move_failed = FALSE;
        GError *error = NULL;
-       EwsFolderId *fid;
+       EwsFolderId *fid = NULL;
        EwsTestData *etd = (gpointer) user_data;
 
        local_server = ews_test_get_mock_server ();
@@ -572,8 +572,8 @@ test_move_folder_to_valid_folder (gconstpointer user_data)
        gboolean moved_to_correct_folder = FALSE;
        GError *error = NULL;
        GSList *folder_ids = NULL;
-       GSList *folders1;
-       GSList *folders2;
+       GSList *folders1 = NULL;
+       GSList *folders2 = NULL;
        EEwsFolder *folder1;
        EEwsFolder *folder2;
        EwsTestData *etd = (gpointer) user_data;