Merge "vpx_ports/mem_ops.h: cast the lhs of bitwise shifts of 24."

vpx_ports/mem_ops.h

@@ -89,7 +89,7 @@ static unsigned MEM_VALUE_T mem_get_be32(const void *vmem) {
   unsigned MEM_VALUE_T  val;
   const MAU_T          *mem = (const MAU_T *)vmem;
 
-  val = ((unsigned int)mem[0]) << 24;
+  val = ((unsigned MEM_VALUE_T)mem[0]) << 24;
   val |= mem[1] << 16;
   val |= mem[2] << 8;
   val |= mem[3];
@@ -125,7 +125,7 @@ static unsigned MEM_VALUE_T mem_get_le32(const void *vmem) {
   unsigned MEM_VALUE_T  val;
   const MAU_T          *mem = (const MAU_T *)vmem;
 
-  val = mem[3] << 24;
+  val = ((unsigned MEM_VALUE_T)mem[3]) << 24;
   val |= mem[2] << 16;
   val |= mem[1] << 8;
   val |= mem[0];