Proper fix for GUI_FitForward callsite using UB #46
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…d that takes iterators for no good reason. Instead, use pointer arithmatic instead of iterators - pointing one-past-the-end is valid, so this is is a valid way to fix the original deref-an-end-iterator-is-illegal bug.
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Use pointer arithmatic instead of iterators. This is still ugly code, but at least it is now valid C++ and, not unimportantly... it actually compiles, as opposed to Ilyass' fix in #39