pci_isab.c missing header

[Alexey Slynko]

Hi,

1) Add missing header with missed prototype
Index: /usr/src1/sys/bus/pci/pci_isab.c
===================================================================
RCS file: /mnt/share/dragonfly-cvs/src/sys/bus/pci/pci_isab.c,v
retrieving revision 1.5
diff -u -r1.5 pci_isab.c
--- /usr/src1/sys/bus/pci/pci_isab.c	8 Aug 2005 01:47:21 -0000	1.5
+++ /usr/src1/sys/bus/pci/pci_isab.c	18 Jan 2006 13:06:12 -0000
@@ -41,6 +41,7 @@
 
 #include <machine/resource.h>
 
+#include <bus/isa/isavar.h>
 #include <bus/pci/pcivar.h>
 #include <bus/pci/pcireg.h>