Fix OOB index in grid::DisplayIter

When resizing prior to this patch, hidden rows in Storage were not
having columns added along with everything else. This feels like a bit
of tech debt, but the patch is simple enough that it won't be much extra
to back out later when the underlying cause is addressed (see comments
in code).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/grid/mod.rs b/src/grid/mod.rs
index 0eea4201..9b36fcdf 100644
--- a/src/grid/mod.rs
+++ b/src/grid/mod.rs
@@ -244,7 +244,7 @@ impl<T: Copy + Clone> Grid<T> {
     }
 
     fn grow_cols(&mut self, cols: index::Column, template: &T) {
-        for row in self.raw.iter_mut() {
+        for row in self.raw.iter_mut_raw() {
             row.grow(cols, template);
         }