Implemenint injecting particles without direction

I was almost sure this was implemented in the past, but it was not working.

Now, if n = 0 or if n is not provided, particles are injected with the normal to the surface.

src/modules/moduleInject.f90

@@ -377,8 +377,14 @@ MODULE moduleInject
           !Assign particle type
           partInj(n)%species => self%species
 
+          if (all(self%n == 0.D0)) then
+            direction =  randomEdge%normal
+
+          else
             direction = self%n
 
+          end if
+
           partInj(n)%v = 0.D0
 
           partInj(n)%v = self%vMod*direction +  (/ self%v(1)%obj%randomVel(), &