PATCH: Minor fix to serial debug option in 2.4.25

[Nick Popoff <cryptic-lkml@bloodletting.com>]

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I work for a PC/104 embedded hardware company and I'm trying to get IRQ 
sharing working for our serial boards and CPU boards with serial ports.

I'm having some trouble with set_multiport and discovered
SERIAL_DEBUG_INTR in serial.c as a helpful option.  When I enabled it I
found a bug in one of the debug statements.  I've attached a patch for
2.4.25 which fixes the bug.

I'm not on this list so please CC me if you have any questions or
comments.  Thanks.

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diff -Naur linux-2.4.25-orig/drivers/char/serial.c linux-2.4.25/drivers/char/serial.c
--- linux-2.4.25-orig/drivers/char/serial.c	2004-02-18 05:36:31.000000000 -0800
+++ linux-2.4.25/drivers/char/serial.c	2004-03-26 18:36:25.000000000 -0800
@@ -924,7 +924,7 @@
 			transmit_chars(info, 0);
 #endif
 		if (pass_counter++ > RS_ISR_PASS_LIMIT) {
-#if SERIAL_DEBUG_INTR
+#ifdef SERIAL_DEBUG_INTR
 			printk("rs_single loop break.\n");
 #endif
 			break;