Stop checking conflicts after the first valid package has been found
Stop checking conflicts after the first valid package has been found

This avoid looping on each repo for a given package when the chosen one
has already been loaded

khorben/pkg,en90/pkg,Open343/pkg,junovitch/pkg,skoef/pkg,en90/pkg,Open343/pkg,skoef/pkg,junovitch/pkg,khorben/pkg,khorben/pkg