1999-08-02  Morten Welinder  <terra@diku.dk>

	* src/expr.c (eval_expr_real): Handle integer operations more
 	carefully with respect to overflow.

	* src/cell.c (cell_cleanout): Don't unlink unless there is a sheet
 	to unlink from.

	* src/collect.c (float_range_function2): Actually call the right
 	function.
	(collect_floats_value): Fix type of result.

	* src/mathfunc.c (range_rsq_pop, range_rsq_est): New functions.

	* src/fn-stat.c (gnumeric_pearson): Simplify.
	(gnumeric_rsq): Simplify.