Bug#252657: dpkg-dev: [arch]-specific Depends broken (see #170575)

[Andreas Metzler <ametzler@logic.univie.ac.at>]

Package: dpkg-dev
Version: 1.10.22
Severity: important

| dpkg (1.10.11) unstable; urgency=low
|   * All dependency fields parsed by controllib.pl support [arch]
|       specifiers.  If the arch specifier doesn't apply for the current
|       arch, then the item will not be added to the internal list structure.
| [...]
|      * Bastian Blank <waldi@debian.org>:
|         Allow for per-arch generated dependency fields.  Closes: #170575

Hello,
This does not work (anymore), dpkg will generate a package without
*any* depends if e.g.
"Depends: ${shlibs:Depends}, debconf,grub[i386]"
is used in debian/control.
             cu andreas

PS: Thanks to Andrew Suffield for pointing out that this is supposed
to work.