Fixed some bugginess with evidence bags.

code/WorkInProgress/detective_work.dm

@@ -136,6 +136,7 @@ obj/machinery/computer/forensic_scanning
 						scanning = I.contents[1]
 						scanning.loc = src
 						I.underlays -= scanning
+						I.icon_state = "evidenceobj"
 					else
 						scanning = I
 						M.drop_item()

code/game/objects/items/weapons/evidence.dm

@@ -23,6 +23,9 @@
 	if(!(O && istype(O)) || O.anchored == 1)
 		user << "You can't put that inside the [src]!"
 		return ..()
+	if(O in user)
+		user << "You are wearing that."
+		return
 	if(src.contents.len > 0)
 		user << "The [src] already has something inside it."
 		return ..()