Cleanup, no logic changes.

mdb/pfile/index.go

@@ -13,13 +13,13 @@ type Index struct {
 }
 
 func NewIndex(f *File) (*Index, error) {
-	maxPage, err := f.maxPage()
+	firstPage, err := f.pageCount()
 	if err != nil {
 		return nil, err
 	}
 
 	idx := &Index{
-		fList: newFreeList(maxPage),
+		fList: newFreeList(firstPage),
 		aList: *newAllocList(),
 		seen:  map[[2]uint64]struct{}{},
 		mask:  []bool{},

mdb/pfile/pagefile.go

@@ -134,7 +134,7 @@ func (pf *File) writePage(page dataPage, id uint64) error {
 // Reading
 // ----------------------------------------------------------------------------
 
-func (pf *File) maxPage() (uint64, error) {
+func (pf *File) pageCount() (uint64, error) {
 	fi, err := pf.f.Stat()
 	if err != nil {
 		return 0, errs.IO.WithErr(err)