mm-video: vdec: Avoid color conversion for Empty EOS O/P buffer.

-Decoder is trying to do color conversion and setting default
color converted buffer length for last EOS Output buffer with
zero FilledLen.Color Conversion should not be called for this
buffer since FilledLen is zero.

Change-Id: I2f7f808c878c4d8ebe2814c049ae32e89637defc

Author: c_sridur

mm-video/vidc/vdec/src/omx_vdec.cpp

@@ -10293,7 +10293,7 @@ OMX_BUFFERHEADERTYPE* omx_vdec::allocate_color_convert_buf::get_il_buf_hdr
     m_out_mem_ptr_client[index].nFlags = (bufadd->nFlags & OMX_BUFFERFLAG_EOS);
     m_out_mem_ptr_client[index].nTimeStamp = bufadd->nTimeStamp;
     bool status;
-    if (!omx->in_reconfig && !omx->output_flush_progress) {
+    if (!omx->in_reconfig && !omx->output_flush_progress && (bufadd->nFilledLen > 0)) {
       pthread_mutex_lock(&omx->c_lock);
       status = c2d.convert(omx->drv_ctx.ptr_outputbuffer[index].pmem_fd,
                   bufadd->pBuffer,pmem_fd[index],pmem_baseaddress[index]);