Particle System: Pass correct particle index when drawing

Passing the wrong index caused the particles to stop being shown when the
first particle dies.

source/blender/draw/intern/draw_cache_impl_particles.c

@@ -584,7 +584,7 @@ static void particle_batch_cache_ensure_pos(Object *object,
 
 	for (curr_point = 0, i = 0, pa = psys->particles; i < psys->totpart; i++, pa++) {
 		state.time = DEG_get_ctime(draw_ctx->depsgraph);
-		if (!psys_get_particle_state(&sim, curr_point, &state, 0)) {
+		if (!psys_get_particle_state(&sim, i, &state, 0)) {
 			continue;
 		}