[s] sanity checks vv_edit_var() values (#52255)

cl ShizCalev
fix: Added some sanity checking for varedit values.
/cl
* sanity checks vv_edit_var() values

* this should be an or

* one more fix

code/controllers/subsystem/blackbox.dm

@@ -69,9 +69,9 @@ SUBSYSTEM_DEF(blackbox)
 
 /datum/controller/subsystem/blackbox/vv_edit_var(var_name, var_value)
 	switch(var_name)
-		if("feedback")
+		if(NAMEOF(src, feedback))
 			return FALSE
-		if("sealed")
+		if(NAMEOF(src, sealed))
 			if(var_value)
 				return Seal()
 			return FALSE

code/controllers/subsystem/title.dm

@@ -47,7 +47,7 @@ SUBSYSTEM_DEF(title)
 	. = ..()
 	if(.)
 		switch(var_name)
-			if("icon")
+			if(NAMEOF(src, icon))
 				if(splash_turf)
 					splash_turf.icon = icon