[pkg] relax reflect 1.14 requirement

pkg/backend/callbacks.go

@@ -2,7 +2,6 @@ package backend
 
 import (
 	"fmt"
-	"reflect"
 	"sync"
 	"unsafe"
 )
@@ -40,6 +39,8 @@ const OnStatusChanged string = "OnStatusChanged"
 func subscribe(event string, fp unsafe.Pointer) {
 	callbackMutex.Lock()
 	defer callbackMutex.Unlock()
+	/* I'm commenting this check because it imposes 1.14, which is only in buster-backports.
+	   We can re-add it after buster is oldstable
 	   e := &Events{}
 	   v := reflect.Indirect(reflect.ValueOf(&e))
 	   hf := v.Elem().FieldByName(event)
@@ -48,6 +49,8 @@ func subscribe(event string, fp unsafe.Pointer) {
 	   } else {
 	           callbacks[event] = (*[0]byte)(fp)
 	   }
+	*/
+	callbacks[event] = (*[0]byte)(fp)
 }
 
 // trigger fires a callback from C-land.