dict: const correctness for av_dict_get() and av_dict_copy()
Merge commit 'd816e125fe1fa5c909b706d47904a4d6c1799996'

* commit 'd816e125fe1fa5c909b706d47904a4d6c1799996':
  dict: const correctness for av_dict_get() and av_dict_copy()

Conflicts:
	libavutil/dict.c
	libavutil/dict.h

See: e12a73246d8ce7d0fc4036522688934e26de4bb1
Merged-by: Michael Niedermayer <michaelni@gmx.at>
apedsp: move to llauddsp

APE is not the sole codec using scalarproduct_and_madd_int16.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>