PX4 / avoidance / 2476

60%

push

travis-ci

Fix build warnings

I tried to build the avoidance repo just now, and the build failed
with clang. The error in clang is just a warning in gcc, so gcc builds,
but with warnings. I've taken the warnings reported by both clang and
gcc, and tried to fix them.

The issues were

* assigning from an uninitialized variable,
* reaching the end of a non-void function, and
* passing a std::string to a "%s" specifier (expects char*).

3 of 3 new or added lines in 3 files covered. (100.0%)

4173 of 6936 relevant lines covered (60.16%)

4967.57 hits per line