pick filter reporting vector values incorrectly

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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Charles discovered this bug and asked me to enter it.

To reproduce this bug, first create a plane source. Create a glyph filter to display the normals (to verify that they all point in the +Z direction. Select the plane as the current filter again. Apply the pick filter to it. With the mouse over the plane, press the 'P' key, and then click 'Accept'. Notice that the Normals listed are not all (0, 0, 1). Point 1 has a normal of (0, 1, 0), and point 1 has a normal of (1, 0, 0).

It appears that instead of incrementing by 3 through vector arrays, we are instead incrementing by 1.