Reverted throw(0); in FPE.h, it is not better than plain abort(); in any way

src/TNL/Debugging/FPE.h

@@ -41,8 +41,8 @@ printStackBacktraceAndAbort( int sig = 0 )
    else
       fprintf( stderr, "Aborting due to signal %d...\n", sig );
    printStackBacktrace();
-   throw( 0 );
-   //abort();
+   // TODO: maybe use MPI_Abort(MPI_COMM_WORLD, 1); if we can detect we run under MPI
+   abort();
 }
 
 /*