Altivec and SSE2 require 16-byte alignment, so make sure they get it

patch by Alexander Strange %astrange A ithinksw P com%


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@12629 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/dct-test.c

@@ -169,7 +169,7 @@ void idct_mmx_init(void)
     }
 }
 
-static DCTELEM block[64] __attribute__ ((aligned (8)));
+static DCTELEM block[64] __attribute__ ((aligned (16)));
 static DCTELEM block1[64] __attribute__ ((aligned (8)));
 static DCTELEM block_org[64] __attribute__ ((aligned (8)));