intrapred_sse2: Fix nasm build

Fixes Issue 96: https://bugs.chromium.org/p/aomedia/issues/detail?id=96&q=&desc=3

Change-Id: I47381ef3930368901c7c2ca6d7f9064216de8ad0

aom_dsp/x86/intrapred_sse2.asm

@@ -64,7 +64,7 @@ cglobal d45_predictor_4x4, 3, 4, 4, dst, stride, above, goffset
   psrlq                m3, 8
   movd   [dstq+strideq  ], m3
   psrlq                m0, 56
-  movd              tempq, m0
+  movd              tempd, m0
   mov    [dstq+strideq+3], tempb
 
   RESTORE_GOT