fixed exit code for cleanup mode to indicate non-error

pedi.cpp

@@ -661,7 +661,7 @@ int main(int argc, char* argv[])
 		clean();
 		if(!my_options.quiet)
 			cout<<"PEDI: Cleanup complete!"<<endl;
-		exit(1);
+		return 0;
 	}
 	update_configs();
 	read_configs();