when creating the mpi communication thread, adopt alias as name in poti

src/debug/traces/starpu_fxt.c

@@ -2461,10 +2461,10 @@ static void handle_mpi_start(struct fxt_ev_64 *ev, struct starpu_fxt_options *op
 #ifdef STARPU_HAVE_POTI
 		char program_container[STARPU_POTI_STR_LEN];
 		program_container_alias(program_container, STARPU_POTI_STR_LEN, prefix);
-		char new_mpicommthread_container_alias[STARPU_POTI_STR_LEN], new_mpicommthread_container_name[STARPU_POTI_STR_LEN];
+		char new_mpicommthread_container_alias[STARPU_POTI_STR_LEN];
 		mpicommthread_container_alias(new_mpicommthread_container_alias, STARPU_POTI_STR_LEN, prefix);
 		snprintf(new_mpicommthread_container_alias, STARPU_POTI_STR_LEN, "%smpict", prefix);
-		poti_CreateContainer(date, new_mpicommthread_container_alias, "MPICt", program_container, new_mpicommthread_container_name);
+		poti_CreateContainer(date, new_mpicommthread_container_alias, "MPICt", program_container, new_mpicommthread_container_alias);
 #else
 		fprintf(out_paje_file, "7	%.9f	%smpict		MPICt	%sp	%smpict\n", date, prefix, prefix, prefix);
 #endif