Added comment to clarify site model convex hull area expansion
Added comment to clarify site model convex hull area expansion


Former-commit-id: 260156422ad5456c9e37cefcea7a7260fe4153e8 [formerly 87fef3d4542439a070eb84aab0c7601e5dfc0522]
Former-commit-id: fcb14ad1e314b0605866666902cc508f490830e3
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine