pr-manager: Fix invalid g_free() crash bug

pr_manager_worker() passes its @opaque argument to g_free().  Wrong;
it points to pr_manager_worker()'s automatic @DaTa.  Broken when
commit 2f3a7ab converted @DaTa from heap- to stack-allocated.  Fix
by deleting the g_free().

Fixes: 2f3a7ab
Cc: qemu-stable@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 6b9d62c)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

scsi/pr-manager.c

@@ -38,7 +38,6 @@ static int pr_manager_worker(void *opaque)
     int fd = data->fd;
     int r;
 
-    g_free(data);
     trace_pr_manager_run(fd, hdr->cmdp[0], hdr->cmdp[1]);
 
     /* The reference was taken in pr_manager_execute.  */