qemu: blockjob: Adjust ATTRIBUTE_NONNULL statements for qemuBlockJobDiskNew

Commit 5ff46aaa added a new parameter but neglected to fix the NONNULL
declarations.
Reported-by: NJulio Faracco <jcfaracco@gmail.com>
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>

src/qemu/qemu_blockjob.h

@@ -106,7 +106,7 @@ qemuBlockJobDiskNew(virDomainObjPtr vm,
                     virDomainDiskDefPtr disk,
                     qemuBlockJobType type,
                     const char *jobname)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(3);
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(4);
 
 qemuBlockJobDataPtr
 qemuBlockJobDiskGetJob(virDomainDiskDefPtr disk)