Fix for DC-797, 1-to-1 (or-none) hydrated dirty
Fix for DC-797, 1-to-1 (or-none) hydrated dirty

Don't consider a change from null to Doctrine_Null to be a value
modification

sogos/doctrine1,aripringle/doctrine1,zikula/doctrine1,fracturedatlas/doctrine1,1ed/doctrine1,zikula/doctrine1,sogos/doctrine1,artyfarty/doctrine1,diablomedia/doctrine1,Recras/doctrine1,Recras/doctrine1,diablomedia/doctrine1,aripringle/doctrine1,artyfarty/doctrine1,PatidarWeb/doctrine1,fracturedatlas/doctrine1