additional cleanup: clean both normally terminated and reusable routines

lib.c

@@ -1206,7 +1206,7 @@ void ink_clean_routines(struct context* ctx) {
     null.value = 0;
     null.type = INK_INTEGER;
     for(i = 0; i < ctx->routines_top; ++i) {
-        if(ctx->routines[i].panic == INK_ROUTINE_CAN_REUSE) {
+        if(ctx->routines[i].panic == INK_ROUTINE_CAN_REUSE || ctx->routines[i].panic == INK_ROUTINE_SUCCESS) {
             for (j = 0; j < ctx->routines[i].top; ++j) {
                 ctx->routines[i].stack[j] = null;
             }