Small bugfix: Atmo meters should work now. Husks can't have blood samples taken.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@2267 316c924e-a436-60f5-8080-3fe189b3f50e

code/modules/chemical/Chemistry-Tools.dm

@@ -864,6 +864,9 @@
 						if(!T.dna)
 							usr << "You are unable to locate any blood. (To be specific, your target seems to be missing their DNA datum)"
 							return
+						if(T.mutations & HUSK) //target done been et, no more blood in him
+							user << "\red You are unable to locate any blood."
+							return
 						B.holder = src
 						B.volume = amount
 						//set reagent data