fix(OpenGeode): add mutex in intersection detection

Author: BotellaA

src/geode/inspector/criterion/intersections/model_intersections.cpp

@@ -176,6 +176,7 @@ namespace
 
         void emplace( geode::index_t p1_id, geode::index_t p2_id )
         {
+            std::lock_guard< std::mutex > lock( mutex_ );
             intersecting_polygons_.emplace_back( p1_id, p2_id );
         }
 
@@ -207,6 +208,7 @@ namespace
         const geode::SurfaceMesh< Model::dim >& mesh2_;
         std::vector< std::pair< geode::index_t, geode::index_t > >
             intersecting_polygons_;
+        std::mutex mutex_;
     };
 
     template < typename Model >