fix: crash when removing guerrilla for Claymores

When the unshaded Claymores Momentum event
is in play:
When a moving group of marching guerrillas activates,
one of the activated guerrillas must be removed.
The code was trying to remove an underground guerrilla
and when that did not exist the program crashed.

src/main/scala/fitl/Bot.scala

@@ -2684,9 +2684,13 @@ object Bot {
                 revealPieces(destName, underground)
 
                 if (momentumInPlay(Mo_Claymores)) {
-                  log(s"\nMust remove Guerrilla that activated [Momentum: $Mo_Claymores")
+                  log(s"\nMust remove 1 Guerrilla that activated [Momentum: $Mo_Claymores]")
                   log(separator())
-                  removeToAvailable(destName, Pieces().set(1, underground.getTypes.head))
+                  val activeGuerrilla = if (faction == VC)
+                    Pieces(vcGuerrillas_A = 1)
+                  else
+                    Pieces(nvaGuerrillas_A = 1)
+                  removeToAvailable(destName, activeGuerrilla)
                 }
                 log()  // Add blank line separator
               }