Let ff_pw_8 be used as an SSE constant

Originally committed as revision 15052 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/i386/dsputil_mmx.c

@@ -48,7 +48,7 @@ DECLARE_ALIGNED_16(const uint64_t, ff_pdw_80000000[2]) =
 DECLARE_ALIGNED_8 (const uint64_t, ff_pw_3  ) = 0x0003000300030003ULL;
 DECLARE_ALIGNED_8 (const uint64_t, ff_pw_4  ) = 0x0004000400040004ULL;
 DECLARE_ALIGNED_16(const xmm_t,    ff_pw_5  ) = {0x0005000500050005ULL, 0x0005000500050005ULL};
-DECLARE_ALIGNED_8 (const uint64_t, ff_pw_8  ) = 0x0008000800080008ULL;
+DECLARE_ALIGNED_16(const xmm_t,    ff_pw_8  ) = {0x0008000800080008ULL, 0x0008000800080008ULL};
 DECLARE_ALIGNED_8 (const uint64_t, ff_pw_15 ) = 0x000F000F000F000FULL;
 DECLARE_ALIGNED_16(const xmm_t,    ff_pw_16 ) = {0x0010001000100010ULL, 0x0010001000100010ULL};
 DECLARE_ALIGNED_8 (const uint64_t, ff_pw_20 ) = 0x0014001400140014ULL;

libavcodec/i386/dsputil_mmx.h

@@ -35,7 +35,7 @@ extern const uint64_t ff_pdw_80000000[2];
 extern const uint64_t ff_pw_3;
 extern const uint64_t ff_pw_4;
 extern const xmm_t    ff_pw_5;
-extern const uint64_t ff_pw_8;
+extern const xmm_t    ff_pw_8;
 extern const uint64_t ff_pw_15;
 extern const xmm_t    ff_pw_16;
 extern const uint64_t ff_pw_20;