Ignoring result of chdir() function

[socketpair]

  CXX(target) Release/obj.target/pty/src/unix/pty.o
../src/unix/pty.cc: In function ‘v8::Handle<v8::Value> PtyFork(const v8::Arguments&)’:
../src/unix/pty.cc:185:34: warning: ignoring return value of ‘int chdir(const char*)’, declared with attribute warn_unused_result [-Wunused-result]
       if (strlen(cwd)) chdir(cwd);
                                  ^
  SOLINK_MODULE(target) Release/obj.target/pty.node
  SOLINK_MODULE(target) Release/obj.target/pty.node: Finished
  COPY Release/pty.node