[geary] Do not crash if ~/.local/share/geary does not exist. Bug 741883

[Michael Gratton <mjog src gnome org>]

commit 46e176451fec6e75be08d315e2e2f54bbcc588d2
Author: Oskar Viljasaar <oskar viljasaar gmail com>
Date:   Sat Jul 16 03:15:20 2016 +0200

    Do not crash if ~/.local/share/geary does not exist. Bug 741883

 src/client/util/util-migrate.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/client/util/util-migrate.vala b/src/client/util/util-migrate.vala
index 1d92f54..17303c7 100644
--- a/src/client/util/util-migrate.vala
+++ b/src/client/util/util-migrate.vala
@@ -25,6 +25,10 @@ namespace Migrate {
         File new_config_file;
         File old_config_file;
 
+        // Return if Geary has never been run (~/.local/share/geary does not exist).
+        if (!user_data_dir.query_exists())
+            return;
+
         // Create ~/.config/geary
         try {
             user_config_dir.make_directory_with_parents();