[evolution-data-server] Fix maybe-used-uninitialized compiler warning from camel-pop3-folder.c

[Milan Crha <mcrha src gnome org>]

commit 6feba4ed023d6e9fd1e509fa36b0ad6a57657af9
Author: Milan Crha <mcrha redhat com>
Date:   Mon Mar 20 17:52:16 2017 +0100

    Fix maybe-used-uninitialized compiler warning from camel-pop3-folder.c

 src/camel/providers/pop3/camel-pop3-folder.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/camel/providers/pop3/camel-pop3-folder.c b/src/camel/providers/pop3/camel-pop3-folder.c
index 0e7426d..1db295b 100644
--- a/src/camel/providers/pop3/camel-pop3-folder.c
+++ b/src/camel/providers/pop3/camel-pop3-folder.c
@@ -410,7 +410,7 @@ pop3_folder_get_message_internal_sync (CamelFolder *folder,
        CamelPOP3Command *pcr;
        CamelPOP3FolderInfo *fi;
        gchar buffer[1];
-       gint i, last;
+       gint i = -1, last;
        CamelStream *stream = NULL;
        CamelService *service;
        CamelSettings *settings;