Update misc.cpp

Fix a bug which resets all parameters to default value when writing a fec parameter to the fifo file.

misc.cpp

@@ -292,9 +292,7 @@ int handle_command(char *s)
 			mylog(log_warn,"failed to parse [%s]\n",tmp_str);
 			return -1;
 		}
-		int version=g_fec_par.version;
-		g_fec_par.clone(tmp_par);
-		g_fec_par.version=version;
+		g_fec_par.clone_fec(tmp_par);
 		g_fec_par.version++;
 		strcpy(rs_par_str,tmp_str);
 		//g_fec_data_num=a;