More descriptive error for json2csv

better-errror.patch

diff --git a/main.go b/main.go
index f4407a6..c430412 100644
--- a/main.go
+++ b/main.go
@@ -96,6 +96,7 @@ func get_value(data map[string]interface{}, keyparts []string) string {
 func json2csv(r LineReader, w *csv.Writer, keys []string, printHeader bool) {
        var line []byte
        var err error
+       line_count := 0
 
        var expanded_keys [][]string
        for _, key := range keys {
@@ -113,6 +114,7 @@ func json2csv(r LineReader, w *csv.Writer, keys []string, printHeader bool) {
                                break
                        }
                }
+               line_count++
                if len(line) == 0 {
                        continue
                }
@@ -126,7 +128,7 @@ func json2csv(r LineReader, w *csv.Writer, keys []string, printHeader bool) {
                var data map[string]interface{}
                err = json.Unmarshal(line, &data)
                if err != nil {
-                       log.Printf("ERROR Json Decoding: %s - %v", err, line)
+                       log.Printf("ERROR Decoding JSON at line %d: %s\n%s", line_count, err, line)
                        continue
                }