Fix even more missing includes after the common.h removal

Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/sparc/simple_idct_vis.c

@@ -22,8 +22,11 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <stdint.h>
+
 #include "libavcodec/dsputil.h"
 #include "dsputil_vis.h"
+#include "libavutil/mem.h"
 
 static const DECLARE_ALIGNED(8, int16_t, coeffs)[28] = {
     - 1259,- 1259,- 1259,- 1259,