real.c (real_sqrt): Return a bool result indicating whether a floating point exceptio...

real.c (real_sqrt): Return a bool result indicating whether a floating point exception or trap...

	* real.c (real_sqrt): Return a bool result indicating whether
	a floating point exception or trap should be raised.
	* real.h (real_sqrt): Update function prototype.
	* builtins.c (fold_builtin): Only fold non-trapping square
	roots unless we're ignoring errno and trapping math.

From-SVN: r61337