avfilter/vf_spp: Fix endian-dependance in add_block()

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

libavfilter/vf_spp.c

@@ -223,10 +223,14 @@ static inline void add_block(uint16_t *dst, int linesize, const int16_t block[64
     int y;
 
     for (y = 0; y < 8; y++) {
-        *(uint32_t *)&dst[0 + y*linesize] += *(uint32_t *)&block[0 + y*8];
+        dst[0 + y*linesize] += block[0 + y*8];
-        *(uint32_t *)&dst[2 + y*linesize] += *(uint32_t *)&block[2 + y*8];
+        dst[1 + y*linesize] += block[1 + y*8];
-        *(uint32_t *)&dst[4 + y*linesize] += *(uint32_t *)&block[4 + y*8];
+        dst[2 + y*linesize] += block[2 + y*8];
-        *(uint32_t *)&dst[6 + y*linesize] += *(uint32_t *)&block[6 + y*8];
+        dst[3 + y*linesize] += block[3 + y*8];
+        dst[4 + y*linesize] += block[4 + y*8];
+        dst[5 + y*linesize] += block[5 + y*8];
+        dst[6 + y*linesize] += block[6 + y*8];
+        dst[7 + y*linesize] += block[7 + y*8];
     }
 }