--with-dyn-default broken in sox.git (5c58413)

[Eric Wong <normalperson@yhbt.net>]

Hi all, I finally got around to updating my sox.git installation and
noticed my usual --with-dyn-default build switch (inherited from the
Debian packaging) seems incompatible with:

	commit 5c58413544fd600bf12fdc54fa9648f0bc1ea860
	"Don't export (most) internal libsox symbols"

Anyways, I agree with reducing symbol visibility changes;
but haven't looked too closely at the best handle this:

  make[2]: Entering directory `/home/ew/sox/src'
  /bin/bash ../libtool --silent --tag=CC  --silent --mode=link gcc -Wtraditional-conversion  -g -O2 -D_FORTIFY_SOURCE=2 -Wall -W -Wmissing-prototypes -Wstrict-prototypes -pedantic -fopenmp -avoid-version -module -Wl,-rpath=/home/ew/sox/i/lib -Wl,-z,defs -o libsox_fmt_flac.la -rpath /home/ew/sox/i/lib/sox flac.lo libsox.la -lFLAC  -lvorbisenc -lvorbisfile -lvorbis  -logg -lm 
  .libs/flac.o: In function `decoder_read_callback':
  /home/ew/sox/src/flac.c:63: undefined reference to `lsx_error'
  collect2: error: ld returned 1 exit status
  make[2]: *** [libsox_fmt_flac.la] Error 1
  make[2]: Leaving directory `/home/ew/sox/src'
  make[1]: *** [all] Error 2
  make[1]: Leaving directory `/home/ew/sox/src'
  make: *** [all-recursive] Error 1

For now, disabling --with-dyn-default seems to work for me.

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