Rollup merge of #103402 - joshtriplett:niche-wrap-fix, r=oli-obk

Fix wrapped valid-range handling in ty_find_init_error

Rust's niche handling allows for wrapping valid ranges with end < start;
for instance, a valid range with start=43 and end=41 means a niche of
42. Most places in the compiler handle this correctly, but
`ty_find_init_error` assumed that `lo > 0` means the type cannot contain a
zero.

Fix it to handle wrapping ranges.

0 files changed, 0 insertions, 0 deletions