better error handling

io/io_pipe.c

@@ -11,14 +11,12 @@ int io_pipe(int64* d) {
   if (pipe(fds)==-1)
     return 0;
 #endif
-  if (io_fd(fds[1])) {
-    if (io_fd(fds[0])) {
+  if (io_fd(fds[1]) && io_fd(fds[0])) {
     d[0]=fds[0];
     d[1]=fds[1];
     return 1;
   }
   io_close(fds[1]);
-  }
-  close(fds[0]);
+  io_close(fds[0]);
   return 0;
 }

io/io_socketpair.c

@@ -11,14 +11,12 @@ int io_socketpair(int64* d) {
     if (socketpair(AF_INET6,SOCK_STREAM,IPPROTO_TCP,fds)==-1)
       if (socketpair(AF_INET,SOCK_STREAM,IPPROTO_TCP,fds)==-1)
 	return 0;
-  if (io_fd(fds[1])) {
-    if (io_fd(fds[0])) {
+  if (io_fd(fds[1]) && io_fd(fds[0])) {
     d[0]=fds[0];
     d[1]=fds[1];
     return 1;
   }
   io_close(fds[1]);
-  }
-  close(fds[0]);
+  io_close(fds[0]);
   return 0;
 }