Fixed a few errors.

code/modules/chemical/Chemistry-Reagents.dm

@@ -124,7 +124,7 @@ datum
 					self.data["antibodies"] |= M:antibodies
 
 					// check if the blood has antibodies that cure our disease
-					if(self.data["antibodies"] & M:virus2.antigen) if(prob(10))
+					if (M:virus2) if((self.data["antibodies"] & M:virus2.antigen) && prob(10))
 						M:virus2.dead = 1
 
 

code/modules/mob/living/silicon/pai/recruit.dm

@@ -174,7 +174,7 @@ var/datum/paiController/paiController			// Global handler for pAI candidates
 					if(c.key == O.key)
 						hasSubmitted = 1
 				if(!hasSubmitted && O.client.be_pai)
-					spawn question(O.client)
+					spawn question(O.client, origin)
 
 	proc/question(var/client/C, var/mob/origin)
 		asked.Add(C.key)

code/modules/recycling/disposal.dm

@@ -74,16 +74,12 @@
 			return
 
 		else
-			if(isnull(I)) // Added these calls to CRASH to diagnose a runtime error that may be one of the causes of erasure errors --Abi79
-				CRASH("disposal/attackby() was called, but I was nulled before calling user.drop_item()")
-
-			var/debug_item_name = I.name
+			if(isnull(I))
+				//CRASH("disposal/attackby() was called, but I was nulled before calling user.drop_item()")
+				return // No idea why, but somehow I gets nulled before it goes into the else, and that leads to a lot of spam with runtime errors.
 
 			user.drop_item()
 
-			if(isnull(I))
-				CRASH("disposal/attackby() was called with [debug_item_name] as I, but I was nulled after calling user.drop_item()")
-
 			I.loc = src
 			user << "You place \the [I] into the [src]."
 			for(var/mob/M in viewers(src))