j2kenc: update function name.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/j2kenc.c

@@ -820,7 +820,7 @@ static int encode_tile(J2kEncoderContext *s, J2kTile *tile, int tileno)
         J2kComponent *comp = s->tile[tileno].comp + compno;
 
         av_log(s->avctx, AV_LOG_DEBUG,"dwt\n");
-        if (ret = ff_dwt_encode(&comp->dwt, comp->data))
+        if (ret = ff_j2k_dwt_encode(&comp->dwt, comp->data))
             return ret;
         av_log(s->avctx, AV_LOG_DEBUG,"after dwt -> tier1\n");