Don't show "contents of [bottle] smash all over [target]" message if …

…bottles are empty (#4819)

code/modules/reagents/reagent_containers/food/drinks/bottle.dm

@@ -49,7 +49,7 @@
 	..()
 
 	if(bottle_thrower_intent != I_HELP)
-		if(reagents)
+		if(reagents && reagents.total_volume)
 			hit_atom.visible_message(SPAN_NOTICE("The contents of \the [src] splash all over [hit_atom]!"))
 			reagents.splash(hit_atom, reagents.total_volume)
 		src.smash(loc, hit_atom)
@@ -160,7 +160,7 @@
 		user.visible_message(SPAN_DANGER("\The [user] smashes [src] into [target]!"))
 
 	//The reagents in the bottle splash all over the target, thanks for the idea Nodrak
-	if(reagents)
+	if(reagents && reagents.total_volume)
 		user.visible_message(SPAN_NOTICE("The contents of \the [src] splash all over [target]!"))
 		reagents.splash(target, reagents.total_volume)