Fix float argument check in minetest.set_timeofday() (#10483)

Co-authored-by: Zughy <4279489-marco_a@users.noreply.gitlab.com>

src/script/lua_api/l_env.cpp

@@ -751,8 +751,9 @@ int ModApiEnvMod::l_set_timeofday(lua_State *L)
 
 	// Do it
 	float timeofday_f = readParam<float>(L, 1);
-	sanity_check(timeofday_f >= 0.0 && timeofday_f <= 1.0);
-	int timeofday_mh = (int)(timeofday_f * 24000.0);
+	luaL_argcheck(L, timeofday_f >= 0.0f && timeofday_f <= 1.0f, 1,
+		"value must be between 0 and 1");
+	int timeofday_mh = (int)(timeofday_f * 24000.0f);
 	// This should be set directly in the environment but currently
 	// such changes aren't immediately sent to the clients, so call
 	// the server instead.