ACF1: Fix Lua error when hitting Attack after failing the rope challenge
"difficulty" variable was falsely set to 0 in this case, but only 1 or 2 are allowed
Lua scripts for engine testing. These scripts are the same as other Lua scripts
in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or
`EndLuaTest(TEST_FAILED)` when the test is completed.