Just rename a variable

No change in logic, just rename a variable for better clarity.

src/slurmctld/step_mgr.c

@@ -1402,13 +1402,14 @@ _pick_step_nodes (struct job_record  *job_ptr,
 							 cpus_needed,
 							 usable_cpu_cnt);
 			if (node_tmp == NULL) {
-				int avail_node_cnt = bit_set_count(nodes_avail);
-				avail_node_cnt += nodes_picked_cnt;
-				if (step_spec->max_nodes <= avail_node_cnt) {
+				/* Count of nodes already picked for step */
+				int pick_node_cnt = bit_set_count(nodes_avail);
+				pick_node_cnt += nodes_picked_cnt;
+				if (step_spec->max_nodes <= pick_node_cnt) {
 					*return_code =
 						ESLURM_TOO_MANY_REQUESTED_CPUS;
 				} else if (step_spec->min_nodes <=
-					   (avail_node_cnt+mem_blocked_nodes)) {
+					   (pick_node_cnt+mem_blocked_nodes)) {
 					*return_code = ESLURM_NODES_BUSY;
 				} else if (!bit_super_set(job_ptr->node_bitmap,
 							  up_node_bitmap)) {