Fix dirac decoder build dependencies.

Found, analysed and tested by trac user Jamal.

Fixes part of ticket #1428.

configure

@@ -1419,6 +1419,7 @@ cavs_decoder_select="golomb"
 cook_decoder_select="mdct sinewin"
 cscd_decoder_suggest="zlib"
 dca_decoder_select="mdct"
+dirac_decoder_select="dwt golomb"
 dnxhd_encoder_select="aandct"
 dxa_decoder_select="zlib"
 eac3_decoder_select="ac3_decoder"

libavcodec/Makefile

@@ -37,7 +37,7 @@ OBJS-$(CONFIG_AC3DSP)                  += ac3dsp.o
 OBJS-$(CONFIG_CRYSTALHD)               += crystalhd.o
 OBJS-$(CONFIG_ENCODERS)                += faandct.o jfdctfst.o jfdctint.o
 OBJS-$(CONFIG_DCT)                     += dct.o dct32_fixed.o dct32_float.o
-OBJS-$(CONFIG_DWT)                     += dwt.o
+OBJS-$(CONFIG_DWT)                     += dwt.o snow.o
 OBJS-$(CONFIG_DXVA2)                   += dxva2.o
 FFT-OBJS-$(CONFIG_HARDCODED_TABLES)    += cos_tables.o cos_fixed_tables.o
 OBJS-$(CONFIG_FFT)                     += avfft.o fft_fixed.o fft_float.o \