Update comment.

slurm/slurm.h.in

@@ -150,7 +150,7 @@ enum job_states {
 	JOB_FAILED,		/* completed execution unsuccessfully */
 	JOB_TIMEOUT,		/* terminated on reaching time limit */
 	JOB_NODE_FAIL,		/* terminated on node failure */
-	JOB_END			/* last entry in table */
+	JOB_END			/* not a real state, last entry in table */
 };
 #define JOB_COMPLETING (0x8000)