[PATCH] i386: Fix io_apic.c warning

gcc 4.2 warns

linux/arch/i386/kernel/io_apic.c: In function ‘create_irq’:
linux/arch/i386/kernel/io_apic.c:2488: warning: ‘vector’ may be used uninitialized in this function

The warning is false, but somewhat legitimate so work around it.

Signed-off-by: Andi Kleen <ak@suse.de>
diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index e21dcde..2424cc9 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -2485,7 +2485,7 @@
 int create_irq(void)
 {
 	/* Allocate an unused irq */
-	int irq, new, vector;
+	int irq, new, vector = 0;
 	unsigned long flags;
 
 	irq = -ENOSPC;