MacPorts should not exit with status code 0 if a failure occurred

[ryandesign (Ryan Carsten Schmidt)]

$ sudo port clean pure-reduce && sudo port -n build pure-reduce build.jobs=14; echo $?
--->  Cleaning pure-reduce
--->  Computing dependencies for pure-reduce
--->  Fetching distfiles for pure-reduce
--->  Verifying checksums for pure-reduce
--->  Extracting pure-reduce
--->  Applying patches to pure-reduce
--->  Configuring pure-reduce
--->  Building pure-reduce
Error: Failed to build pure-reduce: command execution failed
Error: See /opt/local/var/macports/logs/_Users_rschmidt_macports_dports_devel_pure-reduce/pure-reduce/main.log for details.
Error: Follow http://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port pure-reduce failed
0
$ 

[cooljeanius (Eric Gallager)]

Cc Me!

[ryandesign (Ryan Carsten Schmidt)]

Related to #51972.