[Fixes #123675791] The test for existence of slider bounds was not taking into account the falsi-ness of zero.
[Fixes #123675791] The test for existence of slider bounds was not taking into account the falsi-ness of zero.

concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap,concord-consortium/codap