src/libFLAC/include/private/macros.h : Fix flac_min.
src/libFLAC/include/private/macros.h : Fix flac_min.

The existing flac_min macro was generating -Wshadow compiler warnings
when nested.

fredericgermain/flac,LordJZ/libflac,Distrotech/flac,fredericgermain/flac,waitman/flac,Distrotech/flac,waitman/flac,LordJZ/libflac,LordJZ/libflac,fredericgermain/flac,waitman/flac,Distrotech/flac,waitman/flac,waitman/flac,Distrotech/flac,LordJZ/libflac,fredericgermain/flac