newer sub package zaps main package instead of waiting

[jidanni@jidanni.org]

I.e., here we see apt gets it right for php5, but not for gimp:
# apt-get -o Debug::pkgProblemResolver=true dist-upgrade
Investigating php5
Package php5 has broken dep on libapache2-mod-php5
Package php5 has broken dep on libapache2-mod-php5filter
Package php5 has broken dep on php5-cgi
  Or group remove for php5
Package php5 has broken dep on php5-common
Investigating gimp
Package gimp has broken dep on gimp-data
  Considering gimp-data 2 as a solution to gimp 0
  Removing gimp rather than change gimp-data
 Try to Re-Instate php5
Done