Merge branch 'eviden/fixPpivGpu' into 'master'

memset with GPU data is not valid...

See merge request solverstack/chameleon!449

runtime/starpu/interface/cppi_interface.c

@@ -86,7 +86,6 @@ cppi_allocate_data_on_node( void *data_interface, unsigned node )
     cppi_interface->has_diag = 0;
     cppi_interface->pivot.pivrow  = dataptr;
     cppi_interface->pivot.diagrow = ((char*)dataptr) + cppi_interface->arraysize;
-    memset( cppi_interface->pivot.pivrow, 0, cppi_interface->arraysize * 2 );
 
     return requested_memory;
 }