Fixed plot_uhs [skip hazardlib][demos]
Fixed plot_uhs [skip hazardlib][demos]


Former-commit-id: 743c1ee84c5dfe04e8ba94ce01f48849a15be296 [formerly 743c1ee84c5dfe04e8ba94ce01f48849a15be296 [formerly 3289c0f8d1616ad4e0eac67975d5fb4295417ee4]]
Former-commit-id: 34da3f331dd06c34b3694200298c49bde8729a13
Former-commit-id: 2766a5777ca2b6cce8c71908011b29e1182c6ca4
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine