Fix apparent bug in pci bios handle_1ab10e function.

The PIR entry copy was copying the header instead of the slots.
diff --git a/src/pcibios.c b/src/pcibios.c
index 0dafcf1..d156518 100644
--- a/src/pcibios.c
+++ b/src/pcibios.c
@@ -149,7 +149,7 @@
 
     // Memcpy pir table slots to dest buffer.
     memcpy_far(MAKE_FARPTR(destseg, d)
-               , MAKE_FARPTR(SEG_BIOS, pirtable_g)
+               , MAKE_FARPTR(SEG_BIOS, pirtable_g->slots)
                , pirsize);
 
     // XXX - bochs bios sets bx to (1 << 9) | (1 << 11)