Convert remaining error_report() to warn_report()

In a previous patch (3dc6f869) we
converted uses of error_report("warning:"... to use warn_report()
instead. This was to help standardise on a single method of printing
warnings to the user.

There appears to have been some cases that slipped through in patch sets
applied around the same time, this patch catches the few remaining
cases.

All of the warnings were changed using this command:
  find ./* -type f -exec sed -i \
    's|error_report(".*warning[,:] |warn_report("|Ig' {} +

Indentation fixed up manually afterwards.

Two messages were manually fixed up as well.
Signed-off-by: NAlistair Francis <alistair.francis@xilinx.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Max Reitz <mreitz@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Cornelia Huck <cohuck@redhat.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: NCornelia Huck <cohuck@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <eec8cba0d5434bd828639e5e45f12182490ff47d.1505158760.git.alistair.francis@xilinx.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

block/qcow2.c

@@ -301,10 +301,11 @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
             }
 
             if (!(s->autoclear_features & QCOW2_AUTOCLEAR_BITMAPS)) {
-                error_report("WARNING: a program lacking bitmap support "
-                             "modified this file, so all bitmaps are now "
-                             "considered inconsistent. Some clusters may be "
-                             "leaked, run 'qemu-img check -r' on the image "
+                warn_report("a program lacking bitmap support "
+                            "modified this file, so all bitmaps are now "
+                            "considered inconsistent");
+                error_printf("Some clusters may be leaked, "
+                             "run 'qemu-img check -r' on the image "
                              "file to fix.");
                 if (need_update_header != NULL) {
                     /* Updating is needed to drop invalid bitmap extension. */

target/s390x/kvm.c

@@ -224,8 +224,8 @@ static void kvm_s390_enable_cmma(void)
     };
 
     if (mem_path) {
-        error_report("Warning: CMM will not be enabled because it is not "
-                     "compatible to hugetlbfs.");
+        warn_report("CMM will not be enabled because it is not "
+                    "compatible with hugetlbfs.");
         return;
     }
     rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);

trace/control.c

@@ -72,8 +72,8 @@ void trace_event_register_group(TraceEvent **events)
         if (likely(next_vcpu_id < CPU_TRACE_DSTATE_MAX_EVENTS)) {
             events[i]->vcpu_id = next_vcpu_id++;
         } else {
-            error_report("WARNING: too many vcpu trace events; dropping '%s'",
-                         events[i]->name);
+            warn_report("too many vcpu trace events; dropping '%s'",
+                        events[i]->name);
         }
     }
     event_groups = g_renew(TraceEventGroup, event_groups, nevent_groups + 1);