vlib: fix coverity warning
Use correct signed type to allow testing for a failure (-1) from
readlinkat().
Type: fix
Fixes:
@@ -390,7 +390,7 @@ vlib_pci_get_device_root_bus (vlib_pci_addr_t *addr, vlib_pci_addr_t *root_bus)
u8 *rel_path = 0, *abs_path = 0, *link_path = 0;
unformat_input_t input;
int fd = open (sysfs_pci_dev_path, O_RDONLY);
- u32 size = 0;
+ ssize_t size = 0;
u32 domain = 0, bus;
clib_error_t *err = NULL;
