BUG: fix sinc for torch (#56)

Author: lucascolley

src/array_api_extra/_funcs.py

@@ -543,6 +543,8 @@ def sinc(x: Array, /, *, xp: ModuleType | None = None) -> Array:
         raise ValueError(err_msg)
     # no scalars in `where` - array-api#807
     y = xp.pi * xp.where(
-        x, x, xp.asarray(xp.finfo(x.dtype).eps, dtype=x.dtype, device=x.device)
+        xp.astype(x, xp.bool),
+        x,
+        xp.asarray(xp.finfo(x.dtype).eps, dtype=x.dtype, device=x.device),
     )
     return xp.sin(y) / y