Fix bug

Author: bennibolm

src/solvers/dgsem_p4est/subcell_limiters_3d.jl

@@ -179,7 +179,7 @@ end
 
 @inline function calc_bounds_twosided_boundary!(var_min, var_max, variable, u, t,
                                                 boundary_conditions::BoundaryConditionPeriodic,
-                                                mesh::Union{TreeMesh{3}, P4estMesh{3}},
+                                                mesh::P4estMesh{3},
                                                 equations, dg, cache)
     return nothing
 end