[LyX/2.4.x] Initialize is_long_tabular before updateIndexes() (which employs it)

[Juergen Spitzmueller]

commit 26834b7a07626d44d81aea619e219ec26e00cb79
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Mon May 20 08:50:39 2024 +0200

    Initialize is_long_tabular before updateIndexes() (which employs it)
    
    (cherry picked from commit 10b5f03d95dca8f3e8c225aa2deca4d473f8b169)
---
 src/insets/InsetTabular.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/insets/InsetTabular.cpp b/src/insets/InsetTabular.cpp
index 5242775e7f..da8e426935 100644
--- a/src/insets/InsetTabular.cpp
+++ b/src/insets/InsetTabular.cpp
@@ -783,8 +783,8 @@ void Tabular::init(Buffer * buf, row_type rows_arg,
 	row_info.reserve(10);
 	column_info.reserve(10);
 	cell_info.reserve(100);
-	updateIndexes();
 	is_long_tabular = false;
+	updateIndexes();
 	tabular_valignment = LYX_VALIGN_MIDDLE;
 	tabular_width = Length();
 	longtabular_alignment = LYX_LONGTABULAR_ALIGN_CENTER;