Fixed a bunch of the runtime errors cropping up in the server logs.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@175 316c924e-a436-60f5-8080-3fe189b3f50e

code/WorkInProgress/Chemistry-Reagents.dm

@@ -569,7 +569,8 @@ datum
 				if(istype(O,/obj/decal/cleanable))
 					del(O)
 				else
-					O.clean_blood()
+					if (O)
+						O.clean_blood()
 			reaction_turf(var/turf/T, var/volume)
 				T.overlays = null
 				T.clean_blood()

code/WorkInProgress/Chemistry-Tools.dm

@@ -250,6 +250,7 @@
 							O.show_message(text("\red [] was hit by the syringe!", M), 1)
 
 						del(D)
+						return
 
 					for(var/atom/A in D.loc)
 						if(A == user) continue

code/WorkInProgress/recycling/disposal.dm

@@ -442,9 +442,9 @@
 	relaymove(mob/user as mob)
 		if (user.stat)
 			return
-
-		for (var/mob/M in hearers(src.loc.loc))
-			M << "<FONT size=[max(0, 5 - get_dist(src, M))]>CLONG, clong!</FONT>"
+		if (src.loc)
+			for (var/mob/M in hearers(src.loc.loc))
+				M << "<FONT size=[max(0, 5 - get_dist(src, M))]>CLONG, clong!</FONT>"
 
 		playsound(src.loc, 'clang.ogg', 50, 0, 0)