[PATCH] Allow OpenPIC irq 0 to be used

[Val Henson]

Synergy boards do not have an i8259 hooked up to irq 0, instead we
actually use it as a normal irq line.  Yes, I know, bad idea, but
we're stuck with it.  The following patch is ugly, but illustrates the
general idea in a way which might possibly be compatible with other
OpenPIC boards.

-VAL

===== arch/ppc/kernel/open_pic.c 1.47 vs edited =====
--- 1.47/arch/ppc/kernel/open_pic.c	Tue Feb  5 03:10:24 2002
+++ edited/arch/ppc/kernel/open_pic.c	Mon Apr 15 13:42:12 2002
@@ -366,7 +366,7 @@
 	}

 	/* Init all external sources */
-	for (i = 1; i < NumSources; i++) {
+	for (i = offset ? 1 : 0; i < NumSources; i++) {
 		int pri, sense;

 		if (ISR[i] == 0)

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