Revert incorrect pthread optimization

It didn't work in some circumstances.

Author: kleisauke

system/lib/pthread/library_pthread.c

@@ -394,16 +394,16 @@ EMSCRIPTEN_RESULT emscripten_wait_for_call_v(em_queued_call* call, double timeou
   emscripten_set_current_thread_status(EM_THREAD_STATUS_WAITPROXY);
 
   double timeoutUntilTime = emscripten_get_now() + timeoutMSecs;
-  int r;
   do {
-    r = emscripten_futex_wait(&call->operationDone, 0, timeoutMSecs);
+    emscripten_futex_wait(&call->operationDone, 0, timeoutMSecs);
+    done = emscripten_atomic_load_u32(&call->operationDone);
 
     timeoutMSecs = timeoutUntilTime - emscripten_get_now();
-  } while (r == -ETIMEDOUT && timeoutMSecs > 0);
+  } while (!done && timeoutMSecs > 0);
 
   emscripten_set_current_thread_status(EM_THREAD_STATUS_RUNNING);
 
-  return r == 0 ? EMSCRIPTEN_RESULT_SUCCESS : EMSCRIPTEN_RESULT_TIMED_OUT;
+  return done ? EMSCRIPTEN_RESULT_SUCCESS : EMSCRIPTEN_RESULT_TIMED_OUT;
 }
 
 EMSCRIPTEN_RESULT emscripten_wait_for_call_i(