src: fix unchecked return warning from coverity

Fix unchecked return warning from coverity in
src/env.cc. Added check in same manner as other
places where uv_async_init is called.

Signed-off-by: Michael Dawson <mdawson@devrus.com>

PR-URL: #42176
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

src/env.cc

@@ -545,21 +545,21 @@ void Environment::InitializeLibuv() {
   CHECK_EQ(0, uv_timer_init(event_loop(), timer_handle()));
   uv_unref(reinterpret_cast<uv_handle_t*>(timer_handle()));
 
-  uv_check_init(event_loop(), immediate_check_handle());
+  CHECK_EQ(0, uv_check_init(event_loop(), immediate_check_handle()));
   uv_unref(reinterpret_cast<uv_handle_t*>(immediate_check_handle()));
 
-  uv_idle_init(event_loop(), immediate_idle_handle());
+  CHECK_EQ(0, uv_idle_init(event_loop(), immediate_idle_handle()));
 
-  uv_check_start(immediate_check_handle(), CheckImmediate);
+  CHECK_EQ(0, uv_check_start(immediate_check_handle(), CheckImmediate));
 
   // Inform V8's CPU profiler when we're idle.  The profiler is sampling-based
   // but not all samples are created equal; mark the wall clock time spent in
   // epoll_wait() and friends so profiling tools can filter it out.  The samples
   // still end up in v8.log but with state=IDLE rather than state=EXTERNAL.
-  uv_prepare_init(event_loop(), &idle_prepare_handle_);
-  uv_check_init(event_loop(), &idle_check_handle_);
+  CHECK_EQ(0, uv_prepare_init(event_loop(), &idle_prepare_handle_));
+  CHECK_EQ(0, uv_check_init(event_loop(), &idle_check_handle_));
 
-  uv_async_init(
+  CHECK_EQ(0, uv_async_init(
       event_loop(),
       &task_queues_async_,
       [](uv_async_t* async) {
@@ -568,7 +568,7 @@ void Environment::InitializeLibuv() {
         HandleScope handle_scope(env->isolate());
         Context::Scope context_scope(env->context());
         env->RunAndClearNativeImmediates();
-      });
+      }));
   uv_unref(reinterpret_cast<uv_handle_t*>(&idle_prepare_handle_));
   uv_unref(reinterpret_cast<uv_handle_t*>(&idle_check_handle_));
   uv_unref(reinterpret_cast<uv_handle_t*>(&task_queues_async_));