Remove "const" qualifier to eliminate warning.

src/plugins/mpi/mpichgm/mpichgm.c

@@ -319,7 +319,7 @@ gmpi_state_create(const mpi_plugin_client_info_t *job)
 
 	state->tid = (pthread_t)-1;
 	state->fd  = -1;
-	state->job = job;
+	state->job = (mpi_plugin_client_info_t *) job;
 
 	return state;
 }