fix warning

mpi/src/mpi/starpu_mpi_mpi.c

@@ -112,6 +112,10 @@ extern void smpi_process_set_user_data(void *);
 #endif
 #endif
 
+#ifdef STARPU_USE_FXT
+static int trace_loop = 0;
+#endif
+
  /********************************************************/
  /*                                                      */
  /*  Send/Receive functionalities                        */

mpi/src/starpu_mpi_fxt.h

@@ -60,7 +60,6 @@ extern "C"
 #define _STARPU_MPI_FUT_DRIVER_RUN_END			0x5217
 
 #ifdef STARPU_USE_FXT
-static int trace_loop = 0;
 
 #define _STARPU_MPI_TRACE_START(rank, worldsize)	\
 	FUT_DO_PROBE3(_STARPU_MPI_FUT_START, (rank), (worldsize), _starpu_gettid());