Some runtime fixes for the med data computer and hopefully the mule cart.

Fixes issue 526. MMI-Mech issues
MMIs can now change intent. There's no feedback, but they can at least function properly now in mechs.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@5098 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/mob/mob_helpers.dm

@@ -356,7 +356,7 @@ var/list/intents = list("help","disarm","grab","hurt")
 	set name = "a-intent"
 	set hidden = 1
 
-	if(ishuman(src) || istype(src,/mob/living/carbon/alien/humanoid))
+	if(ishuman(src) || isalienadult(src) || isbrain(src))
 		switch(input)
 			if("help","disarm","grab","hurt")
 				a_intent = input