gallium/util: fix undefined shift to the last bit in u_bit_scan

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h
index 0a82915..d983af3 100644 (file)
--- a/src/gallium/auxiliary/util/u_math.h
+++ b/src/gallium/auxiliary/util/u_math.h
@@ -489,7 +489,7 @@ static inline int
 u_bit_scan(unsigned *mask)
 {
    int i = ffs(*mask) - 1;
-   *mask &= ~(1 << i);
+   *mask &= ~(1u << i);
    return i;
 }