just in case. one more nil check
issue #871 in hedgewars: "Hedgehog dropping into water while still attached to a rope makes engine crash"
Due to doStepRopeWork's being completely skipped 75% of the ticks - including drowning/detachment-condition checks
issue #867: Update German mission strings
fix for
issue #855: Failure to teleport rarely makes engine crash
issue #829: Drill rocket drilling dust is slightly misplaced
issue #852: Using blowtorch to dig through the wrap-around border in caves fails miserably
issue #865: gfResetHealth is not exposed to Lua
issue #755: Lua API: Add ammo type parameter for onHogAttack