alternatively check in a versioned depends if the candidate is good

alternatively check in a versioned depends if  the candidate is good

The old code used to do move on to versions behind the candidate in
cases the candidate wasn't a match, but as the Install request later
always installs the candidate (witch wasn't switched) this could have
never worked - and shouldn't in most cases anyway as:
a) it could only work for <, <=, != depends which are unusal
b) doesn't respect pinning, so it could install -1 versions