The following gcc warning is only emitted when `cmake` has been
invoked with `-DCMAKE_CXX_FLAGS='-Og'` for debug purposes.
````
generator/maxspeeds_builder.cpp: In lambda function:
generator/maxspeeds_builder.cpp:249:9: warning: ‘status’ may be used uninitialized [-Wmaybe-uninitialized]
249 | if (status == 0)
| ^~
generator/maxspeeds_builder.cpp:181:13: note: ‘status’ was declared here
181 | int status;
| ^~~~~~
````
Signed-off-by: Ferenc Géczi <ferenc.gm@gmail.com>
