Muhammad vs. "Locks of Love": Are People who Donate Hair Cursed?

My wife recently had most of her (rather long) hair cut off. The hair was donated to "Locks of Love," an organization that makes wigs for children who have lost their hair due to medical problems or treatments (e.g. chemotherapy). These children are often traumatized to learn that they may be dying. Locks of Love helps them in a small way by providing wigs so that people won't stare at the children.

According to Muhammad, my wife is now under Allah's curse, and so is the little girl who gets my wife's hair (and all who give or receive hair).

Sahih al-Bukhari 5941: Narrated Asma: A woman asked the Prophet saying, "O Allah's Messenger! My daughter got measles and her hair fell out. Now that I got her married, may I let her use false hair?" He said (to her), "Allah has cursed the lady who lengthens hair artificially and the one who gets her hair lengthened artificially."

Sahih al-Bukhari 5940: Narrated Ibn Umar: The Prophet has cursed the lady who lengthens her hair artificially and the one who gets her hair lengthened.