main: print clear error message if CIPHERDIR is missing

Getting just the help text in response to

	gocryptfs -info -config external.config

is confusing: https://github.com/rfjakob/gocryptfs/issues/157

1 files changed, 1 insertions, 1 deletions

diff --git a/info.go b/info.go
index c2e0038..b6f041f 100644
--- a/info.go
+++ b/info.go
@@ -20,7 +20,7 @@ func info(filename string) {
 	// Read from disk
 	js, err := ioutil.ReadFile(filename)
 	if err != nil {
-		tlog.Fatal.Printf("info: ReadFile: %#v\n", err)
+		tlog.Fatal.Printf("Reading config file failed: %v", err)
 		os.Exit(exitcodes.LoadConf)
 	}
 	// Unmarshal