fix bug that only first line has been converted from ascii to unicode

bnn.go

@@ -135,6 +135,7 @@ func ReadBnnFile(path string) (Bnn, error) {
 
 // ReadBnn Reads from reader and returns object with all containing information
 func ReadBnn(r io.Reader) (Bnn, error) {
+	//dr := charmap.CodePage850.NewDecoder().Reader(r)
 	scanner := bufio.NewScanner(r)
 	var lines []string
 
@@ -143,14 +144,19 @@ func ReadBnn(r io.Reader) (Bnn, error) {
 	}
 
 	var content Bnn
+	var encoding string
 
 	for i, line := range lines {
 		var item Item
 
-		// Encoding ASCII
+		// How to decode file? Use header info for encoding information.
+		if i == 0 && strings.Split(line, ";")[2] == "0" {
+			encoding = "ascii"
+		}
+
 		// Example file for ASCII was provided by Paxan
 		// Extended ASCII has been used -> ä 132 \u0084
-		if strings.Split(line, ";")[2] == "0" {
+		if encoding == "ascii" {
 			line, _ = charmap.CodePage850.NewDecoder().String(line)
 		}