1999-02-10  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* src/cell.c (cell_relocate): When relocating a cell with a
	formula, always mark it as changed.  We were doing that before
	only for the case where the location had changed, but we use
	cell_relocate in other cases as well.

	* src/fn-string.c (gnumeric_lower, gnumeric_upper): These
	functions were wrong.  They were never incrementing the pointer
	and they were releasing the wrong pointer.

	* src/clipboard.c (paste_cell): When pasting a cell, mark the
	contents as modified.

	* src/file.c (file_saver_is_default_format): Make sure the saver
	is always set.