add d-pointer, virtual destructors and de-inline de/constructors

To have a chance to keep the ABI for a while we need all three to team
up. One of them missing and we might loose, so ensuring that they are
available is a very tedious but needed task once in a while.

Git-Dch: Ignore

1 files changed, 3 insertions, 0 deletions

diff --git a/apt-pkg/version.cc b/apt-pkg/version.cc
index 29bee46da..f32d39a69 100644
--- a/apt-pkg/version.cc
+++ b/apt-pkg/version.cc
@@ -40,3 +40,6 @@ pkgVersioningSystem *pkgVersioningSystem::GetVS(const char *Label)
    return 0;
 }
 									/*}}}*/
+
+
+pkgVersioningSystem::~pkgVersioningSystem() {}