Ignoring vim working files
Broken assignment in hqpbo.hxx

Caught by clang -Wunused-comparison
Fixing dangling else

Caught by clang -Wdangling-else
graphcut should keep gm_ as pointer

Can't initialize from a temporary (dangling stack reference)
Disambiguating parentheses on comparison

Caught by clang -Wlogical-not-parentheses
(both ways of disambiguating lead to same result in this case)
Comparison should be assignment in LSATR