Rename WTAP_ERR_UNSUPPORTED_FILE_TYPE to WTAP_ERR_UNWRITABLE_FILE_TYPE.

That makes it clearer what the problem is, and that it should only be
returned by the dump code path, not by the read code path.

Change-Id: I22d407efe3ae9fba7aa25f08f050317549866442
Reviewed-on: https://code.wireshark.org/review/5798
Reviewed-by: Guy Harris <guy@alum.mit.edu>

1 files changed, 1 insertions, 1 deletions

diff --git a/file.c b/file.c
index 3c47bbd1cc..bfe7f71451 100644
--- a/file.c
+++ b/file.c
@@ -5020,7 +5020,7 @@ cf_open_failure_alert_box(const char *filename, int err, gchar *err_info,
             display_basename, wtap_file_type_subtype_string(file_type));
       break;
 
-    case WTAP_ERR_UNSUPPORTED_FILE_TYPE:
+    case WTAP_ERR_UNWRITABLE_FILE_TYPE:
       /* Seen only when opening a capture file for writing. */
       simple_error_message_box(
             "Wireshark doesn't support writing capture files in that format.");