Screen: Remove superfluous guards.
The code commented with `nowrap!` has no use: `_cuX` and `_cuY` get updated to this value on image resize. This code also appeared in functions unrelated to horizontal wrapping. I also took the liberty to update the conditions which determine whether to use "default values". Before, the conditions only checked for zero instead of (invalid) negative numbers (maybe a few Q_ASSERT's are desired here?).
parent
91d7001e
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mentioned in merge request !431 (merged)
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mentioned in merge request !510 (merged)
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