change type of preserve_env from uint16_t to bool

slurm/slurm.h.in

@@ -825,7 +825,7 @@ typedef struct {
 	uint16_t ntasks_per_core;
 	uint16_t task_dist;
 	uint16_t plane_size;
-	uint16_t preserve_env;
+	bool preserve_env;
 
 	char *mpi_plugin_name;
 	uint8_t open_mode;