load mesh data and structure meshes

src/engine/gameManager/BuildingManager.java

@@ -995,8 +995,11 @@ public enum BuildingManager {
 
             for (int mesh : meshes) {
 
-                if (!mesh_heights.containsKey(mesh) || !mesh_triangle_points.containsKey(mesh))
+                if (!mesh_heights.containsKey(mesh)) {
-                    return; //no data for this mesh
+                    continue; //no data for this mesh
+                }
+                if(!mesh_triangle_points.containsKey(mesh))
+                    continue;
 
                 Mesh generatedMesh = new Mesh();
                 generatedMesh.parentBuilding = building;