[SAB] Fix crash in Atomics.wake w/ infinite count.

src/futex-emulation.cc

Index: src/futex-emulation.cc
diff --git a/src/futex-emulation.cc b/src/futex-emulation.cc
index 9374986cde79fae65be4f6cae423d349353d8dd1..43db1b4914e480910e97bc4bba47a73fc2f29131 100644
--- a/src/futex-emulation.cc
+++ b/src/futex-emulation.cc
@@ -188,11 +188,11 @@ Object* FutexEmulation::Wait(Isolate* isolate,
   return result;
 }
 
-
 Object* FutexEmulation::Wake(Isolate* isolate,
                              Handle<JSArrayBuffer> array_buffer, size_t addr,
-                             int num_waiters_to_wake) {
+                             double num_waiters_to_wake) {
   DCHECK(addr < NumberToSize(array_buffer->byte_length()));
+  DCHECK(num_waiters_to_wake >= 0);
 
   int waiters_woken = 0;
   void* backing_store = array_buffer->backing_store();