[evolution-mapi] M!1 - camel-mapi-store: prefer g_string_append_c() over g_string_append

[Milan Crha <mcrha src gnome org>]

commit 58dea4a3958c5d4b663083a7da0d6915ea4c2b6e
Author: Дилян Палаузов <git-dpa aegee org>
Date:   Sat Jul 6 19:44:24 2019 +0000

    M!1 - camel-mapi-store: prefer g_string_append_c() over g_string_append
    
    Closes https://gitlab.gnome.org/GNOME/evolution-mapi/merge_requests/1

 src/camel/camel-mapi-store.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/camel/camel-mapi-store.c b/src/camel/camel-mapi-store.c
index cd67d6d..77aa6f9 100644
--- a/src/camel/camel-mapi-store.c
+++ b/src/camel/camel-mapi-store.c
@@ -3418,7 +3418,7 @@ camel_mapi_store_announce_subscribed_folder (CamelMapiStore *mapi_store,
        /* first announce about virtual parents */
        for (ii = 0; parts[ii]; ii++) {
                if (ii > 0)
-                       g_string_append (partial_path, "/");
+                       g_string_append_c (partial_path, '/');
                g_string_append (partial_path, parts[ii]);
 
                si = camel_store_summary_path (mapi_store->summary, partial_path->str);