[qemu-xen]: Fix warnings

[Andre Przywara <andre.przywara@amd.com>]

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Ian,

first thanks for updating qemu/ioemu to a more recent version, that 
gives a lot of nice features.
Below patch fixes two warnings when compiling. If slirp is out of the 
way, we have only one warning left (monitor.c:69) that prevents us from 
setting --enable-werror (at least on my setup ;-) This fix is not trivial:
- Either refactor the whole monitor code to use other ways of calling 
the handler functions or
- use casts at every call
Does anyone know of a method preventing gcc to give this particular 
warning at this particular code line (some kind of pragma?) This would 
be a much easier solution than the above ones.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>

Regards,
Andre.


-- 
Andre Przywara
AMD-Operating System Research Center (OSRC), Dresden, Germany
Tel: +49 351 277-84917
----to satisfy European Law for business letters:
AMD Saxony Limited Liability Company & Co. KG,
Wilschdorfer Landstr. 101, 01109 Dresden, Germany
Register Court Dresden: HRA 4896, General Partner authorized
to represent: AMD Saxony LLC (Wilmington, Delaware, US)
General Manager of AMD Saxony LLC: Dr. Hans-R. Deppe, Thomas McCoy

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diff --git a/hw/scsi-generic.c b/hw/scsi-generic.c
index 60084cf..3973c25 100644
--- a/hw/scsi-generic.c
+++ b/hw/scsi-generic.c
@@ -478,8 +478,8 @@ static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
                                  uint8_t *cmd, int lun)
 {
     SCSIDeviceState *s = d->state;
-    uint32_t len;
-    int cmdlen;
+    uint32_t len=0;
+    int cmdlen=0;
     SCSIRequest *r;
     int ret;
 
diff --git a/i386-dm/helper2.c b/i386-dm/helper2.c
index 6437c37..d630cb0 100644
--- a/i386-dm/helper2.c
+++ b/i386-dm/helper2.c
@@ -418,7 +418,8 @@ void cpu_ioreq_timeoffset(CPUState *env, ioreq_t *req)
 
     time_offset += (unsigned long)req->data;
 
-    fprintf(logfile, "Time offset set %ld, added offset %lld\n", time_offset, req->data);
+    fprintf(logfile, "Time offset set %ld, added offset %"PRId64"\n",
+        time_offset, req->data);
     sprintf(b, "%ld", time_offset);
     xenstore_vm_write(domid, "rtc/timeoffset", b);
 }

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