--- libev/ev.c	2007/11/01 15:21:13	1.38
+++ libev/ev.c	2007/11/01 17:17:32	1.39
@@ -425,7 +425,7 @@
 
   while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)
     for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
-      if (w->pid == pid || w->pid == -1)
+      if (w->pid == pid || !w->pid)
         {
           w->status = status;
           event ((W)w, EV_CHILD);