No it wouldn't have. Saint Travon was still black, and Zimmerman isn't. That's all that mattered to the Zombies.
The ironic thing is that by traditional classification standards, Zimmerman, by virtue of having a black great grandparent, would be considered black.
And I'll guarantee you if Martin was a white youth who managed to beat Zimmerman to death or cause him brain damage, Zimmerman would in fact be very black.