correct array indices / size

std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE][MAX_KEY], 0) is wrong
std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE-1][MAX_KEY-1], 0) looks better but is still wrong
std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE][MAX_KEY-1], 0) is also wrong
std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE-1][MAX_KEY], 0) is correct but looks weird ;-)
Merge branch 'master' into bugfix
Configuration for Travis-CI, used for Coverity Analysis
correct array indices / size

std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE][MAX_KEY], 0) is wrong
std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE-1][MAX_KEY-1], 0) looks better but is still wrong
std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE][MAX_KEY-1], 0) is also wrong
std::fill(&Key2Event[0][0], &Key2Event[MAX_MODE-1][MAX_KEY], 0) is correct but looks weird ;-)
Airspaces: add Serial attribute
merge from bugfix
Merge branch 'master' of http://git.xcsoar.org/cgit/master/xcsoar
now running Coverity on 'master' branch