Only try to detect the events lib dir if it wasn't set earlier.
tree1a187878a9e3dc6c87fb6b5712f9a4f4e991f2a0
-rw-r--r-- 5958 .bzrignore
-rw-r--r-- 5361 .gitignore
-rw-r--r-- 332 BUGS.txt
-rw-r--r-- 35147 COPYING
-rw-r--r-- 11290 NEWS
-rw-r--r-- 188 PFIF.txt
-rw-r--r-- 4989 TODO
-rw-r--r-- 6438 WHATSNEW.txt
-rw-r--r-- 5377 howto.txt
drwxr-xr-x - packaging
-rw-r--r-- 30949 prog_guide.txt
drwxr-xr-x - source4
drwxr-xr-x - swat
-rw-r--r-- 2478 swat2.txt
drwxr-xr-x - testdata
drwxr-xr-x - testprogs