rtc-svc: Init svc->number_spatial/temporal_layers

Should be initialized to 1 in init_config.
No change in behavior.

Change-Id: I570dfcf1657064bbfe370696989d2a777ae6e307
diff --git a/av1/encoder/encoder.c b/av1/encoder/encoder.c
index 8290723..86fb308 100644
--- a/av1/encoder/encoder.c
+++ b/av1/encoder/encoder.c
@@ -1485,6 +1485,8 @@
   cpi->use_svc = 0;
   cpi->svc.external_ref_frame_config = 0;
   cpi->svc.non_reference_frame = 0;
+  cpi->svc.number_spatial_layers = 1;
+  cpi->svc.number_temporal_layers = 1;
   cm->number_spatial_layers = 1;
   cm->number_temporal_layers = 1;
   cm->spatial_layer_id = 0;