Register: Don't double-delete when typing over a selection.

In numcell or formulacell.

gnucash/register/register-core/formulacell.c

@@ -151,6 +151,8 @@ gnc_formula_cell_modify_verify( BasicCell *_cell,
     if (change == NULL)
     {
         gnc_basic_cell_set_value_internal( &cell->cell, newval );
+        // Remove any selection.
+        *end_selection = *start_selection = *cursor_position;
         return;
     }
 

gnucash/register/register-core/numcell.c

@@ -92,6 +92,8 @@ gnc_num_cell_modify_verify (BasicCell *_cell,
         /* then just accept the proposed change */
     {
         gnc_basic_cell_set_value_internal (&cell->cell, newval);
+        // Remove any selection.
+        *end_selection = *start_selection = *cursor_position;
         return;
     }