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Shift bits before making value negative (#9255)

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mergify[bot] 2025-10-15 10:21:37 +00:00 committed by GitHub
commit 864d4b6e09
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src/libImaging/BcnDecode.c
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@ -603,7 +603,7 @@ static void
bc6_sign_extend(UINT16 *v, int prec) {
int x = *v;
if (x & (1 << (prec - 1))) {
x |= -1 << prec;
x |= -(1 << prec);
}
*v = (UINT16)x;
}