Fix printing only on the master rank (#1268)

Regression introduced in a1308a1.

Author: Technici4n

src/response/hessian.jl

@@ -82,7 +82,7 @@ function ResponseCallback()
     ResponseCallback(Ref(zero(UInt64)))
 end
 function (cb::ResponseCallback)(info)
-    mpi_master(info.basis.comm_kpts) && return info  # Only print on master
+    mpi_master(info.basis.comm_kpts) || return info  # Only print on master
 
     if info.stage == :finalize
         info.converged || @warn "solve_ΩplusK not converged."