qemu: Don't report some ignored errors in qemuDomainGetStatsOneBlockFallback

The function ignores all errors from qemuStorageLimitsRefresh by calling
virResetLastError. This still logs them. Since qemuStorageLimitsRefresh
allows suppressing some, do so.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_driver.c

@@ -21301,7 +21301,7 @@ qemuDomainGetStatsOneBlockFallback(virQEMUDriverPtr driver,
     if (virStorageSourceIsEmpty(src))
         return 0;
 
-    if (qemuStorageLimitsRefresh(driver, cfg, dom, src, false) < 0) {
+    if (qemuStorageLimitsRefresh(driver, cfg, dom, src, true) <= 0) {
         virResetLastError();
         return 0;
     }