Compiling with -Werror showed a possible use before initialization

in src/qemu_driver.c.  Make sure to initialize the olddisk ptr to NULL.
Signed-off-by: NChris Lalancette <clalance@redhat.com>

ChangeLog

+Thu Oct 16 15:41:00 CEST 2008 Chris Lalancette <clalance@redhat.com>
+	* Compiling with -Werror showed a possible use before initialization
+	in src/qemu_driver.c.  Make sure to initialize the origdisk ptr to
+	NULL.
+
 Thu Oct 16 15:04:36 +0200 Jim Meyering <meyering@redhat.com>
 
 	build: exempt *.ico files from the trailing blank check

src/qemu_driver.c

@@ -2401,6 +2401,7 @@ static int qemudDomainChangeEjectableMedia(virDomainPtr dom,
         return -1;
     }
 
+    origdisk = NULL;
     newdisk = dev->data.disk;
     for (i = 0 ; i < vm->def->ndisks ; i++) {
         if (vm->def->disks[i]->bus == newdisk->bus &&