You no longer beat R&D machinery when linking (#2541)

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## About The Pull Request
no more smacking the machines with your multitool
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## Why It's Good For The Game
no more beatings
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## Changelog

:cl:
fix: you no longer commit violence against machines
/:cl:

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code/modules/research/rdmachines.dm

@@ -55,6 +55,7 @@
 			var/obj/machinery/rnd/server/server = multi.buffer
 			linked_techweb = server.stored_research
 			visible_message("Linked to [server]!")
+			return TRUE
 	if(is_refillable() && O.is_drainable())
 		return FALSE //inserting reagents into the machine
 	if(Insert_Item(O, user))