Fix build break from previous commit ‒ not necessary anyway
Fix build break from previous commit ‒ not necessary anyway

GCC chokes on SL(__PRETTY_FUNCTION__), claiming it expands to
u8__PRETTY_FUNCTION__. This is inconsistent with the successful expansion
of SL(__FILE__), but since it’s not really/ necessary, we just avoid
using SL() here.

raffaellod/lofty,raffaellod/lofty