Fixes runtimes caused by energy bolas (#90469)

## About The Pull Request

Certain throw impact callbacks, like those on energy bolas, could cause
the object to get deleted, which would make throwing datums runtime
because they didn't account for it.

## Changelog
🆑
fix: Fixed runtimes caused by energy bolas
/🆑

code/controllers/subsystem/throwing.dm

@@ -232,6 +232,9 @@ SUBSYSTEM_DEF(throwing)
 
 	if (callback)
 		callback.Invoke()
+		// Same can happen in the callback
+		if(QDELETED(thrownthing))
+			return
 
 	if(!thrownthing.currently_z_moving) // I don't think you can zfall while thrown but hey, just in case.
 		var/turf/T = get_turf(thrownthing)