the SONAME upstream was bumped to try and sort out the 1.19.x/1.20.x mess, but
since we've always had 1.20.x in our tree, we dont care about that breakage.

http://lists.linux.it/pipermail/gpm/2008-June/001026.html
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473496

--- gpm/configure
+++ gpm/configure
@@ -1736,2 +1736,2 @@
-abi_lev="2"
-abi_age="1"
+abi_lev="1"
+abi_age="20"