remove useless #ifdef around extern declaration

Originally committed as revision 11105 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/i386/dsputil_mmx.c

@@ -3303,7 +3303,6 @@ static void float_to_int16_sse(int16_t *dst, const float *src, int len){
     asm volatile("emms");
 }
 
-#ifdef CONFIG_SNOW_DECODER
 extern void ff_snow_horizontal_compose97i_sse2(DWTELEM *b, int width);
 extern void ff_snow_horizontal_compose97i_mmx(DWTELEM *b, int width);
 extern void ff_snow_vertical_compose97i_sse2(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
@@ -3312,7 +3311,6 @@ extern void ff_snow_inner_add_yblock_sse2(const uint8_t *obmc, const int obmc_st
                            int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
 extern void ff_snow_inner_add_yblock_mmx(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h,
                           int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
-#endif
 
 void dsputil_init_mmx(DSPContext* c, AVCodecContext *avctx)
 {