Fix bad bug number

debian/changelog

@@ -5,7 +5,7 @@ dpkg (1.15.5) UNRELEASED; urgency=low
 
   [ Raphaël Hertzog ]
   * Add versioned dependency on base-files (>= 5.0.0) to dpkg-dev to ensure
-    that /etc/dpkg/origins/default exists. Closes: #545275
+    that /etc/dpkg/origins/default exists. Closes: #545274
 
   [ Updated dpkg translations ]
   * German (Sven Joachim).