Keep byte compiler happy

lisp/org-latex.el

@@ -1320,6 +1320,7 @@ The conversion is made depending of STRING-BEFORE and STRING-AFTER."
 
 
 (defvar org-table-last-alignment) ; defined in org-table.el
+(defvar org-table-last-column-widths) ; defined in org-table.el
 (declare-function orgtbl-to-latex "org-table" (table params) t)
 (defun org-export-latex-tables (insert)
   "Convert tables to LaTeX and INSERT it."