Bug#623623: upgrade 623623

[Helmut Grohne]

severity 623623 serious
thanks

pbuilder cannot be used without pbuilder --create and pbuilder --create
uses dpkg-architecture which is contained in dpkg-dev. So this is a
missing dependency which should be serious according to policy 7.2:

| The Depends field should be used if the depended-on package is required
| for the depending package to provide a significant amount of
| functionality. 

Helmut