ncdu: rev-upgrade still fails after three tries

[reneeotten (Renee Otten)]

The recent update of ncdu broke the installation at least on 10.15.7. It tries to upgrade the port, then realizes it is broken when running rev-upgrade, tries to rebuild and fails in all three attempts.

Error appears to be:

Incompatible library version: /opt/local/bin/ncdu requires version 5.40.0 or later, but /usr/lib/libncurses.5.4.dylib provides version 5.4.0
DEBUG: Marking /opt/local/bin/ncdu as broken
--->  Found 1 broken file, matching files to ports
--->  Found 1 broken port, determining rebuild order
DEBUG: Broken: ncdu
DEBUG: Processing port ncdu @0:2.2_0
You can always run 'port rev-upgrade' again to fix errors.
The following ports will be rebuilt: ncdu @2.2

It links to

> otool -L /opt/local/bin/ncdu
/opt/local/bin/ncdu:
	/usr/lib/libncurses.5.4.dylib (compatibility version 5.40.0, current version 5.40.0)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.60.1)

which doesn't look right - it should like use the MacPorts' version of ncurses as it declares a dependency on that port.