This earthquake can be noting but good for Haiti. People saw and heard there were problems and poverty here, but did nothing. Now due to the earthquake, people see and and millions of dollars are pouring and and will continue too. It is going to spur growth and economic activity. like ars said, bad initially, but great in the long run.
This MAY end up being good the economy of Haiti in the long run, but it is a huge tragedy in a human scale.
Also, remember that for it to help their economy, that humanitarian aid has to stick around for the rebuilding. If everyone makes a huge push to help right now, but then stops as soon as all the bodies are collected, it will not help.
This does not apply in this case because it is bringing in resources from outside of the country. The broken window fallacy only applies in a relatively closed system.
Of course, even if this DOES improve the economy (and I am not saying it will, just that it does not violate the broken window fallacy if it does) this was a horrible tragedy with an enormous deathtoll.
I don't even understand the broken window fallacy. The broken window repair does seem to increase GDP, as long as G means Gross (Gross Domestic Product).
Of course the net gain is zero, but that's not what GDP mean, I think.