Update HttpErr

It now no longer has to go through json encoding and uses a hardcoded
string instead. Also clears the one location where an error could occur

other/httpErr.go

@@ -1,23 +1,16 @@
 package other
 
 import (
-	"encoding/json"
 	"fmt"
 	"net/http"
 )
 
-func HttpErr(w http.ResponseWriter, errId int, message string, code int) error {
-	type errStruct struct {
-		Id      int    `json:"id"`
-		Message string `json:"message"`
-	}
-
-	data, err := json.Marshal(errStruct{errId, message})
-	if err != nil {
-		return err
-	}
+// Return an error over an http connection.
+// The error will have the given return code `code`
+// and a json encoded body with the field "id" set to `errId`
+// and a field "message" set to the `message`
+func HttpErr(w http.ResponseWriter, errId int, message string, code int) {
 	w.WriteHeader(code)
 	w.Header().Add("Content-Type", "application/json")
-	fmt.Fprint(w, data)
-	return nil
+	fmt.Fprintf(w, "{\"id\": %d, \"message\": \"%s\"}", errId, message)
 }