Merge pull request #8825 from Ghommie/Ghommie-cit110

Ports "Fixes default supplypods exploding their contents" & co.

code/datums/explosion.dm

@@ -198,7 +198,8 @@ GLOBAL_LIST_EMPTY(explosions)
 			var/list/items = list()
 			for(var/I in T)
 				var/atom/A = I
-				items += A.GetAllContents()
+				if (!A.prevent_content_explosion()) //The atom/contents_explosion() proc returns null if the contents ex_acting has been handled by the atom, and TRUE if it hasn't.
+					items += A.GetAllContents()
 			for(var/O in items)
 				var/atom/A = O
 				if(!QDELETED(A))