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FT_ABS() can overflow for INT_MIN and LONG_MIN, reported as https://issues.chromium.org/issues/563962723 We introduce and use ULABS() nd UABS() to avoid that. * include/freetype/internal/ftcalc.h: Add ULABS and UABS. * src/base/ftcalc.c (FT_Matrix_Check, ft_corner_orientation): Updated.