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Fix: Crash when extra viewport height is zero with sign in view. (#9175)

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If a viewport sign straddles the top of a viewport, a crash will occur if the viewport height is zero. This is resolved by simply not attempting to draw the viewport in this situation, consistent with other widgets.
This commit is contained in:
PeterN
2021-05-02 10:21:27 +01:00
committed by Charles Pigott
parent a8c5f8a10b
commit dd70d0ad85
1 changed files with 2 additions and 0 deletions
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src/widget.cpp
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@@ -1913,6 +1913,8 @@ void NWidgetViewport::SetupSmallestSize(Window *w, bool init_array)
void NWidgetViewport::Draw(const Window *w)
{
if (this->current_x == 0 || this->current_y == 0) return;
if (this->disp_flags & ND_NO_TRANSPARENCY) {
TransparencyOptionBits to_backup = _transparency_opt;
_transparency_opt &= (1 << TO_SIGNS) | (1 << TO_LOADING); // Disable all transparency, except textual stuff