You can no longer put the cyborg gripper in a display case (#26848)

Co-authored-by: [email protected] <[email protected]>

code/game/objects/items/robot/cyborg_gripper.dm

@@ -15,6 +15,7 @@
 	icon = 'icons/obj/device.dmi'
 	icon_state = "gripper"
 	actions_types = list(/datum/action/item_action/drop_gripped_item)
+	flags = ABSTRACT
 	/// Set to TRUE to removal of cells/lights from machine objects containing them.
 	var/engineering_machine_interaction = FALSE
 	/// Defines what items the gripper can carry.
@@ -50,11 +51,12 @@
 /obj/item/gripper/proc/drop_gripped_item(mob/user, silent = FALSE)
 	if(!gripped_item)
 		to_chat(user, "<span class='warning'>[src] is empty.</span>")
-		return
+		return FALSE
 	if(!silent)
 		to_chat(user, "<span class='warning'>You drop [gripped_item].</span>")
 	gripped_item.forceMove(get_turf(src))
 	gripped_item = null
+	return TRUE
 
 /obj/item/gripper/attack_self(mob/user)
 	if(!gripped_item)

code/modules/mob/living/silicon/robot/robot_inventory.dm

@@ -119,9 +119,8 @@
 
 /mob/living/silicon/robot/drop_item()
 	var/obj/item/gripper/G = get_active_hand()
-	if(istype(G))
-		G.drop_gripped_item(silent = TRUE)
-		return TRUE // The gripper is special because it has a normal item inside that we can drop.
+	if(istype(G)) // The gripper is special because it has a normal item inside that we can drop.
+		return G.drop_gripped_item(silent = TRUE) // This only returns true if there's actually an item to drop so we don't drop the gripper accidentaly.
 	return FALSE // All robot inventory items have NODROP, so they should return FALSE.
 
 //Helper procs for cyborg modules on the UI.