CiviMember - Separate Membership Payment mode - validation of contribution amounts is incorrect

Form validation code for online membership signup is incorrectly requiring the contribution amount to

To recreate with sample data:

• Set contribution page id=2 so that Membership Setting have "Separate Membership Payment" = true. Also enable the Contribution Amount - Other Amount block and field.

• Go to test-drive and select a Membership with a $100 fee and then also enter an additional Contribution of $15 - the current code returns a validation error (requires that the contribution be >= $100). However, if I enter a contribution of $115 and continue - it will generate 2 payments - $100 for the membership and $115 for the contribution for a total of $215. (I should be able to enter a $15 contribution and wind up w/ 2 payments - $100 for membership and $15 for contribution.)

To Fix
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We should NOT do any min amount validation on the contribution amount WHEN "Separate Membership Payment" is TRUE (other than any rules configured explicitly by civicrm_contribution_page min_amount and max_amount).