Handle gzip encoding error

Fix #470

emitter.go

@@ -102,6 +102,9 @@ func CopyMulty(src io.Reader, writers ...io.Writer) (err error) {
 
 			if Settings.prettifyHTTP {
 				payload = prettifyHTTP(payload)
+				if len(payload) == 0 {
+					continue
+				}
 			}
 
 			if Settings.splitOutput {

http_prettifier.go

@@ -52,6 +52,7 @@ func prettifyHTTP(p []byte) []byte {
 
         if err != nil {
             Debug("[Prettifier] GZIP encoding error:", err)
+            return []byte{}
         }
 
         content, _ = ioutil.ReadAll(g)