(inject_windtunnel) placeholder function

src/main/inject_windtunnel.f90

@@ -32,7 +32,7 @@ module inject
  character(len=*), parameter, public :: inject_type = 'windtunnel'
 
  public :: init_inject,inject_particles,write_options_inject,read_options_inject,&
-      set_default_options_inject
+      set_default_options_inject,update_injected_par
 !
 !--runtime settings for this module
 !
@@ -255,6 +255,10 @@ subroutine inject_or_update_particles(ifirst, n, position, velocity, h, u, bound
 
 end subroutine inject_or_update_particles
 
+subroutine update_injected_par
+ ! -- placeholder function
+ ! -- does not do anything and will never be used
+end subroutine
 
 !-----------------------------------------------------------------------
 !+