qga: report error on keyfile dump error

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Cc:qemu-trivial@nongnu.org
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

qga/main.c

@@ -1074,7 +1074,12 @@ static void config_dump(GAConfig *config)
     g_free(tmp);
 
     tmp = g_key_file_to_data(keyfile, NULL, &error);
-    printf("%s", tmp);
+    if (error) {
+        g_critical("Failed to dump keyfile: %s", error->message);
+        g_clear_error(&error);
+    } else {
+        printf("%s", tmp);
+    }
 
     g_free(tmp);
     g_key_file_free(keyfile);