Rename for clarity

Related to #18

src/fellow_log.c

@@ -740,9 +740,9 @@ fellow_signal_open(struct fellow_fd *ffd)
 
 #include "fellow_regionlist.h"
 
-#define fellow_log_prep_max (FELLOW_DISK_LOG_BLOCK_ENTRIES * DLE_BAN_REG_NREGION)
+#define fellow_log_prep_max_regions (FELLOW_DISK_LOG_BLOCK_ENTRIES * DLE_BAN_REG_NREGION)
 
-struct fellow_log_prep_tofree regionlist_stk(fellow_log_prep_max);
+struct fellow_log_prep_tofree regionlist_stk(fellow_log_prep_max_regions);
 struct fellow_log_prep {
 	unsigned magic;
 #define FELLOW_LOG_PREP_MAGIC		0x3f99fab8
@@ -3776,11 +3776,11 @@ fellow_log_entries_prep(struct fellow_log_prep *prep,
 	AN(prep);
 	AN(entry);
 	AN(n);
-	assert(n <= fellow_log_prep_max);
+	assert(n <= fellow_log_prep_max_regions);
 
 	memset(hashpfx, 0, sizeof hashpfx);
 	INIT_OBJ(prep, FELLOW_LOG_PREP_MAGIC);
-	prep->tofree.space = fellow_log_prep_max;
+	prep->tofree.space = fellow_log_prep_max_regions;
 
 	fellow_log_entries_mutate(prep, entry, n);