fix 2 issues :   - remove constant parameters   - perform the approximate scan of the posterior function when making the plot (if requested)
fix 2 issues : 
 - remove constant parameters 
 - perform the approximate scan of the posterior function when making the plot (if requested)


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@34134 27541ba8-7e3a-0410-8455-c3a389f83636

dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT