Compilation fix for (at least) GCC 6
Compilation fix for (at least) GCC 6

jvm-profiling-tools/honest-profiler,RichardWarburton/honest-profiler,jvm-profiling-tools/honest-profiler,jvm-profiling-tools/honest-profiler,nitsanw/honest-profiler,nitsanw/honest-profiler,RichardWarburton/honest-profiler,RichardWarburton/honest-profiler,RichardWarburton/honest-profiler,RichardWarburton/honest-profiler,nitsanw/honest-profiler,nitsanw/honest-profiler,nitsanw/honest-profiler,jvm-profiling-tools/honest-profiler,nitsanw/honest-profiler,RichardWarburton/honest-profiler