vp3dsp: don't do aligned reads on input.

The input is not guaranteed to be aligned.

libavcodec/vp3dsp.c

@@ -282,11 +282,11 @@ static void put_no_rnd_pixels_l2(uint8_t *dst, const uint8_t *src1,
     for (i = 0; i < h; i++) {
         uint32_t a, b;
 
-        a = AV_RN32A(&src1[i * stride]);
-        b = AV_RN32A(&src2[i * stride]);
+        a = AV_RN32(&src1[i * stride]);
+        b = AV_RN32(&src2[i * stride]);
         AV_WN32A(&dst[i * stride], no_rnd_avg32(a, b));
-        a = AV_RN32A(&src1[i * stride + 4]);
-        b = AV_RN32A(&src2[i * stride + 4]);
+        a = AV_RN32(&src1[i * stride + 4]);
+        b = AV_RN32(&src2[i * stride + 4]);
         AV_WN32A(&dst[i * stride + 4], no_rnd_avg32(a, b));
     }
 }