Fix linker warnings for bilinear filters

The declaration of the bilinear filters specified an alignment clause
in the implementation file but not in the header.  This turned out
to be harmless, but it did cause linker warnings to be emitted when
building on Windows.

The (extern) declaration in the header was changed, to match the
declaration in the implementation.

Change-Id: I44be89b1572fe9a50fa47a42e4db9128c4897b04

vp8/common/filter.c

@@ -9,9 +9,7 @@
  */
 
 
-#include <stdlib.h>
 #include "filter.h"
-#include "vpx_ports/mem.h"
 
 DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[8][2]) =
 {

vp8/common/filter.h

@@ -12,11 +12,13 @@
 #ifndef FILTER_H
 #define FILTER_H
 
+#include "vpx_ports/mem.h"
+
 #define BLOCK_HEIGHT_WIDTH 4
 #define VP8_FILTER_WEIGHT 128
 #define VP8_FILTER_SHIFT  7
 
-extern const short vp8_bilinear_filters[8][2];
-extern const short vp8_sub_pel_filters[8][6];
+extern DECLARE_ALIGNED(16, const short, vp8_bilinear_filters[8][2]);
+extern DECLARE_ALIGNED(16, const short, vp8_sub_pel_filters[8][6]);
 
 #endif

vp8/common/x86/filter_x86.c

@@ -8,7 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "vpx_ports/mem.h"
+#include "vp8/common/x86/filter_x86.h"
 
 DECLARE_ALIGNED(16, const short, vp8_bilinear_filters_x86_4[8][8]) =
 {

vp8/common/x86/filter_x86.h

@@ -11,9 +11,15 @@
 #ifndef FILTER_X86_H
 #define FILTER_X86_H
 
+#include "vpx_ports/mem.h"
+
 /* x86 assembly specific copy of vp8/common/filter.c:vp8_bilinear_filters with
  * duplicated values */
-extern const short vp8_bilinear_filters_x86_4[8][8];  /* duplicated 4x */
-extern const short vp8_bilinear_filters_x86_8[8][16]; /* duplicated 8x */
+
+/* duplicated 4x */
+extern DECLARE_ALIGNED(16, const short, vp8_bilinear_filters_x86_4[8][8]);
+
+/* duplicated 8x */
+extern DECLARE_ALIGNED(16, const short, vp8_bilinear_filters_x86_8[8][16]);
 
 #endif /* FILTER_X86_H */