Add transform parameter initialization

The initialization of transform parameters was missing, that led to a
crash in encoder.

Change-Id: I9e35830d5f24e771c845f0d8881671d6b7228c5e

av1/encoder/encodemb.c

diff --git a/av1/encoder/encodemb.c b/av1/encoder/encodemb.c
index e345ba4..91040db 100644
--- a/av1/encoder/encodemb.c
+++ b/av1/encoder/encodemb.c
@@ -1285,7 +1285,10 @@
     }
 
   fwd_txfm_param.rd_transform = 0;
-
+  fwd_txfm_param.tx_type = tx_type;
+  fwd_txfm_param.tx_size = tx_size;
+  fwd_txfm_param.fwd_txfm_opt = FWD_TXFM_OPT_NORMAL;
+  fwd_txfm_param.lossless = xd->lossless[mbmi->segment_id];
   fwd_txfm(src_int16, coeff, diff_stride, &fwd_txfm_param);
   fwd_txfm(pred, ref_coeff, diff_stride, &fwd_txfm_param);