Fix duk_hboundfunc->args memory leak

src-input/duk_hboundfunc.h

@@ -33,7 +33,7 @@ struct duk_hboundfunc {
 	duk_tval this_binding;
 
 	/* Arguments to prepend. */
-	duk_tval *args;
+	duk_tval *args;  /* Separate allocation. */
 	duk_idx_t nargs;
 };
 

src-input/duk_heap_alloc.c

@@ -65,7 +65,12 @@ DUK_INTERNAL void duk_free_hobject(duk_heap *heap, duk_hobject *h) {
 		 * to be unwound to update the 'caller' properties of
 		 * functions in the callstack.
 		 */
+	} else if (DUK_HOBJECT_IS_BOUNDFUNC(h)) {
+		duk_hboundfunc *f = (duk_hboundfunc *) h;
+
+		DUK_FREE(heap, f->args);
 	}
+
 	DUK_FREE(heap, (void *) h);
 }