libvpx: Pull from upstream

source/libvpx/vp9/encoder/x86/vp9_dct32x32_sse2.c

Index: source/libvpx/vp9/encoder/x86/vp9_dct32x32_sse2.c
===================================================================
--- source/libvpx/vp9/encoder/x86/vp9_dct32x32_sse2.c	(revision 293081)
+++ source/libvpx/vp9/encoder/x86/vp9_dct32x32_sse2.c	(working copy)
@@ -13,7 +13,7 @@
 #include "vpx_ports/mem.h"
 
 #define pair_set_epi32(a, b) \
-  _mm_set_epi32(b, a, b, a)
+  _mm_set_epi32((int)(b), (int)(a), (int)(b), (int)(a))
 
 #if FDCT32x32_HIGH_PRECISION
 static INLINE __m128i k_madd_epi32(__m128i a, __m128i b) {
@@ -44,7 +44,7 @@
   //    When we use them, in one case, they are all the same. In all others
   //    it's a pair of them that we need to repeat four times. This is done
   //    by constructing the 32 bit constant corresponding to that pair.
-  const __m128i k__cospi_p16_p16 = _mm_set1_epi16(+cospi_16_64);
+  const __m128i k__cospi_p16_p16 = _mm_set1_epi16((int16_t)cospi_16_64);
   const __m128i k__cospi_p16_m16 = pair_set_epi16(+cospi_16_64, -cospi_16_64);
   const __m128i k__cospi_m08_p24 = pair_set_epi16(-cospi_8_64,   cospi_24_64);
   const __m128i k__cospi_m24_m08 = pair_set_epi16(-cospi_24_64, -cospi_8_64);