Mac: Fixed crash if SDL_GetDisplayDPI() got NULL pointers for output parameters.
#!/bin/sh
#
# Print the current source revision, if available
# FIXME: this prints the tip, which isn't useful if you're on a different
# branch, or just not sync'd to the tip.
hg tip --template 'hg-{rev}:{node|short}' || (echo "hg-0:baadf00d"; exit 1)