Fix automatic encryption

pastee.go

@@ -108,8 +108,14 @@ func (p *Pastee) Submit(paste *Paste) (*PasteResponse, error) {
 	if paste.Encrypted {
 		key = RandStringBytesMaskImprSrc(32)
 
+		var err error
+
 		for _, section := range paste.Sections {
-			section.Contents = cryptojs.Encrypt(section.Contents, key)
+			section.Contents, err = cryptojs.Encrypt(section.Contents, key)
+
+			if err != nil {
+				return nil, err
+			}
 		}
 	}