Various tweaks to cortical borers taken from the /tg/ discussion on the potential port.

code/modules/mob/living/carbon/carbon.dm

@@ -532,7 +532,7 @@
 		B.host_brain << "\red <B><FONT size=3>Horrific, burning agony lances through you, ripping a soundless scream from your trapped mind!</FONT></B>"
 
 //Check for brain worms in head.
-/mob/living/carbon/proc/has_brain_worms()
+/mob/proc/has_brain_worms()
 
 	for(var/I in contents)
 		if(istype(I,/mob/living/simple_animal/borer))

code/modules/mob/living/simple_animal/borer.dm

@@ -140,12 +140,16 @@
 		src << "You cannot do that in your current state."
 		return
 
+	if(host.internal_organs_by_name["brain"]) //this should only run in admin-weirdness situations, but it's here non the less - RR
+		src << "<span class='warning'>There is no brain here for us to command!</span>"
+		return
+
 	src << "You begin delicately adjusting your connection to the host brain..."
 
 	spawn(300+(host.brainloss*5))
 
-		if(!host || !src || controlling) return
-
+		if(!host || !src || controlling)
+			return
 		else
 			src << "\red <B>You plunge your probosci deep into the cortex of the host brain, interfacing directly with their nervous system.</B>"
 			host << "\red <B>You feel a strange shifting sensation behind your eyes as an alien consciousness displaces yours.</B>"