vtenc: Fix PAUSED->READY deadlock when output loop is running
vtenc: Fix PAUSED->READY deadlock when output loop is running
Explicitly calls gst_vtenc_pause_output_loop when going PAUSED->READY to make sure GST_PAD_STREAM_LOCK is not taken.
Before this change, a deadlock would occur if pipeline got stopped right after one output buffer was generated by vtenc.