Fix [#36993] Blender 2.69 test build freezes when changing metaball view resolution to less that 0.100

Tweaking UI range settings, as suggested by Sergej Reich in report.

git-svn-id: https://svn.blender.org/svnroot/bf-blender/trunk@60605 954f8c5b-7b00-dc11-b283-0030488c597c