avutil/random_seed: Use uint64 instead of uint8 for struct to avoid potential alignment issues

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavutil/random_seed.c

@@ -64,7 +64,7 @@ static int read_random(uint32_t *dst, const char *file)
 
 static uint32_t get_generic_seed(void)
 {
-    uint8_t tmp[120];
+    uint64_t tmp[120/8];
     struct AVSHA *sha = (void*)tmp;
     clock_t last_t  = 0;
     static uint64_t i = 0;