Fix the arguments type for on_read and destroy callbacks to match with grpc_iomgr_cb_func

src/core/iomgr/udp_server.c

@@ -146,7 +146,8 @@ static void finish_shutdown(grpc_exec_ctx *exec_ctx, grpc_udp_server *s) {
   gpr_free(s);
 }
 
-static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server, int success) {
+static void destroyed_port(grpc_exec_ctx *exec_ctx, void *server,
+                           bool success) {
   grpc_udp_server *s = server;
   gpr_mu_lock(&s->mu);
   s->destroyed_ports++;
@@ -263,10 +264,10 @@ error:
 }
 
 /* event manager callback when reads are ready */
-static void on_read(grpc_exec_ctx *exec_ctx, void *arg, int success) {
+static void on_read(grpc_exec_ctx *exec_ctx, void *arg, bool success) {
   server_port *sp = arg;
 
-  if (success == 0) {
+  if (!success) {
     gpr_mu_lock(&sp->server->mu);
     if (0 == --sp->server->active_ports) {
       gpr_mu_unlock(&sp->server->mu);

test/core/iomgr/udp_server_test.c

@@ -173,7 +173,7 @@ static void test_receive(int number_of_clients) {
   grpc_exec_ctx_finish(&exec_ctx);
 }
 
-static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, int success) {
+static void destroy_pollset(grpc_exec_ctx *exec_ctx, void *p, bool success) {
   grpc_pollset_destroy(p);
 }