Optimization (faster to check flag).
Optimization (faster to check flag).

Checking a flag for opening is a lot faster than checking if the
filehandle is defined. Speeds up nytprof target from 7.05s to 4.89s.

gregory-nisbet/ack2,openstrike/ack2,petdance/ack2,gregory-nisbet/ack2,packy/ack2,shlomif/ack2,packy/ack2,petdance/ack2,openstrike/ack2,petdance/ack2,h3xx/ack2,shlomif/ack2,jamessan/ack2,petdance/ack2,packy/ack2,gregory-nisbet/ack2,dagolden/ack2,h3xx/ack2,h3xx/ack2,h3xx/ack2,jamessan/ack2,petdance/ack2,karenetheridge/App-Ack,jamessan/ack2,h3xx/ack2,karenetheridge/App-Ack,karenetheridge/App-Ack,openstrike/ack2,jamessan/ack2,petdance/ack2,shlomif/ack2,dagolden/ack2,openstrike/ack2,packy/ack2,openstrike/ack2,packy/ack2,karenetheridge/App-Ack,h3xx/ack2,shlomif/ack2,openstrike/ack2,petdance/ack2,gregory-nisbet/ack2,dagolden/ack2,packy/ack2,packy/ack2,shlomif/ack2,petdance/ack2,openstrike/ack2,dagolden/ack2,karenetheridge/App-Ack,packy/ack2,openstrike/ack2,h3xx/ack2,h3xx/ack2,karenetheridge/App-Ack,jamessan/ack2,gregory-nisbet/ack2,dagolden/ack2,gregory-nisbet/ack2,shlomif/ack2,gregory-nisbet/ack2,gregory-nisbet/ack2,karenetheridge/App-Ack,karenetheridge/App-Ack,dagolden/ack2,jamessan/ack2