[REVIEW-3-5-1] fix for fdo#46885, crash with empty data range when creating charts

[Michael Meeks]

On Sun, 2012-03-04 at 17:23 +0100, Markus Mohrhard wrote:
> [1] fixes a crash when you try to create a chart and have an empty
> data range selected. This is a regression between 3.5.0 and 3.5.1

	I merged this to -3-5, two more acks for -3-5-1 appreciated.

> The fix is extremely safe it just checks that the uno interface is not empty.

	Thanks !

		Michael.