Move SSE optimized 32-point DCT to its own file. Should fix breakage with YASM

disabled.

Originally committed as revision 24078 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/x86/Makefile

@@ -46,3 +46,5 @@ OBJS-$(HAVE_MMX)                       += x86/cpuid.o                   \
                                           x86/motion_est_mmx.o          \
                                           x86/mpegvideo_mmx.o           \
                                           x86/simple_idct_mmx.o         \
+
+MMX-OBJS-$(CONFIG_DCT)                 += x86/dct32_sse.o

libavcodec/x86/fft.c

@@ -43,10 +43,12 @@ av_cold void ff_fft_init_mmx(FFTContext *s)
 #endif
 }
 
+#if CONFIG_DCT
 av_cold void ff_dct_init_mmx(DCTContext *s)
 {
     int has_vectors = mm_support();
     if (has_vectors & FF_MM_SSE && HAVE_SSE)
         s->dct32 = ff_dct32_float_sse;
 }
+#endif