[gnumeric] Dependents: add warning comment about multi-workbook weirdness.

[Morten Welinder <mortenw src gnome org>]

commit f4f3c7066aba68c1a70aab0258e4ad1abd9e6741
Author: Morten Welinder <terra gnome org>
Date:   Sun Jul 29 21:48:03 2012 -0400

    Dependents: add warning comment about multi-workbook weirdness.

 src/dependent.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/dependent.c b/src/dependent.c
index 8028b02..1155790 100644
--- a/src/dependent.c
+++ b/src/dependent.c
@@ -1492,6 +1492,11 @@ gnm_cell_eval_content (GnmCell *cell)
 	/* Prepare to calculate */
 	eval_pos_init_cell (&pos, cell);
 	cell->base.flags |= DEPENDENT_BEING_CALCULATED;
+
+	/*
+	 * I'm somewhat afraid of thinking about the semantics of iteration
+	 * if different workbooks have different settings.
+	 */
 	max_iteration = cell->base.sheet->workbook->iteration.max_number;
 
 iterate :