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util: Fix MIN_NON_ZERO

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MIN_NON_ZERO(1, 0) is evaluated to 0. Rewrite the macro to fix it.

Backports commit b6ece2c6f37926a994bc564a9e55ef3be6016d8f from qemu
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Fam Zheng 2018-02-23 14:09:35 -05:00 committed by Lioncash
parent 1781d5cfa6
commit 5c739f14f5
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1 changed files with 2 additions and 1 deletions
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3
qemu/include/qemu/osdep.h
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@ -134,7 +134,8 @@
/* Minimum function that returns zero only iff both values are zero.
* Intended for use with unsigned values only. */
#ifndef MIN_NON_ZERO
#define MIN_NON_ZERO(a, b) (((a) != 0 && (a) < (b)) ? (a) : (b))
#define MIN_NON_ZERO(a, b) ((a) == 0 ? (b) : \
((b) == 0 ? (a) : (MIN(a, b))))
#endif
/* Round number down to multiple */