Fix logic in lazy vacuum to decide if it's worth trying to truncate the heap.
treefa33ba1ee213b0e3a7d5c4a977a6b7dc595499d1
-rw-r--r-- 1192 COPYRIGHT
-rw-r--r-- 4236 GNUmakefile.in
-rw-r--r-- 1423 Makefile
-rw-r--r-- 1287 README
-rw-r--r-- 767 README.CVS
-rw-r--r-- 387 aclocal.m4
drwxr-xr-x - config
-rwxr-xr-x 790295 configure
-rw-r--r-- 59609 configure.in
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - src