The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2017.04.21.11.49.31 kre src/sys/dev/pci/pci_subr.c,v 1.178 Log files can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2017.04.html#2017.04.21.11.49.31