[gnome-software] trivial: Convert one more common GIOErrorCode

[Richard Hughes <rhughes src gnome org>]

commit 41839f5cd1bcc069bbdce818428397d2b4b22d7c
Author: Richard Hughes <richard hughsie com>
Date:   Tue Mar 7 09:27:27 2017 +0000

    trivial: Convert one more common GIOErrorCode

 src/gs-utils.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-utils.c b/src/gs-utils.c
index de02d71..a6e5090 100644
--- a/src/gs-utils.c
+++ b/src/gs-utils.c
@@ -666,6 +666,7 @@ gs_utils_error_convert_gio (GError **perror)
        case G_IO_ERROR_FAILED:
        case G_IO_ERROR_TIMED_OUT:
        case G_IO_ERROR_NOT_FOUND:
+       case G_IO_ERROR_EXISTS:
                error->code = GS_PLUGIN_ERROR_FAILED;
                break;
        case G_IO_ERROR_NOT_SUPPORTED: