[PATCH] turn many #if $undefined_string into #ifdef $undefined_string

turn many #if $undefined_string into #ifdef $undefined_string to fix some
warnings after -Wno-def was added to global CFLAGS

Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 6466a18..329cb23 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -1505,7 +1505,7 @@
 	memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
 	recovery_cmd->device = cmd->device;
 	recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
-#if AHD_DEBUG
+#ifdef AHD_DEBUG
 	if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 		printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
 		       ahd_name(ahd), cmd->device->channel, cmd->device->id,