make json work with new optionals

Makefile

@@ -2,7 +2,7 @@ all: clean v
 	$(info V has been successfully built)
 
 v: v.c
-	cc -march=native -std=gnu11 -w -o v v.c
+	cc -std=gnu11 -w -o v v.c
 	./v -o v compiler
 	rm v.c
 

compiler/jsgen.v

@@ -105,7 +105,7 @@ string res = tos2("");
 	}
 	// cJSON_delete
 	//p.cgen.fns << '$dec return opt_ok(res); \n}'
-	p.cgen.fns << '$dec return opt_ok(res, sizeof(res)); \n}'
+	p.cgen.fns << '$dec return opt_ok(res, sizeof(*res)); \n}'
 	p.cgen.fns << '/*enc start*/ $enc return o;}'
 }