[file-roller] init error to NULL

[Paolo Bacchilega <paobac src gnome org>]

commit 0e5ca66bca80339903d4fd536c056dde986b76d6
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Mon Aug 31 18:23:19 2015 +0200

    init error to NULL

 src/fr-process.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/fr-process.c b/src/fr-process.c
index 5b8c559..99e98a1 100644
--- a/src/fr-process.c
+++ b/src/fr-process.c
@@ -951,7 +951,7 @@ execute_current_command (ExecuteData *exec_data)
        char          **argv;
        int             out_fd, err_fd;
        int             i = 0;
-       GError         *error;
+       GError         *error = NULL;
 
        debug (DEBUG_INFO, "%d/%d) ", process->priv->current_command, process->priv->n_comm);