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Replace shifting with multiplication when dragging (#3789)

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`dx`, `dy` can be signed negative values, shifting them left is
undefined.
This commit is contained in:
Michał Janiszewski
2016-05-31 23:03:31 +02:00
committed by Ted John
parent 27d846c2f4
commit 9d5827520a
1 changed files with 2 additions and 2 deletions
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4
src/input.c
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@@ -553,8 +553,8 @@ static void input_viewport_drag_continue()
// As the user moved the mouse, don't interpret it as right click in any case.
_ticksSinceDragStart = 1000;
dx <<= viewport->zoom + 1;
dy <<= viewport->zoom + 1;
dx *= 1 << (viewport->zoom + 1);
dy *= 1 << (viewport->zoom + 1);
if (gConfigGeneral.invert_viewport_drag){
w->saved_view_x -= dx;
w->saved_view_y -= dy;