qemu: process: Use enum belonging to correct type

GCC was unhappy about comparison between two distinct enum types. Use
the correct value instead.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

src/qemu/qemu_process.c

@@ -7835,7 +7835,7 @@ qemuProcessRefreshLegacyBlockjob(void *payload,
         return 0;
     }
 
-    if (jobtype == VIR_DOMAIN_BLOCK_JOB_TYPE_COMMIT &&
+    if (jobtype == QEMU_BLOCKJOB_TYPE_COMMIT &&
         disk->mirrorJob == VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT)
         jobtype = disk->mirrorJob;