Update max alloc size on 386 arch

bolt_386.go

@@ -2,3 +2,6 @@ package bolt
 
 // maxMapSize represents the largest mmap size supported by Bolt.
 const maxMapSize = 0x7FFFFFFF // 2GB
+
+// maxAllocSize is the size used when creating array pointers.
+const maxAllocSize = 0xFFFFFFF

bolt_amd64.go

@@ -2,3 +2,6 @@ package bolt
 
 // maxMapSize represents the largest mmap size supported by Bolt.
 const maxMapSize = 0xFFFFFFFFFFFF // 256TB
+
+// maxAllocSize is the size used when creating array pointers.
+const maxAllocSize = 0x7FFFFFFF

page.go

@@ -8,7 +8,6 @@ import (
 
 const pageHeaderSize = int(unsafe.Offsetof(((*page)(nil)).ptr))
 
-const maxAllocSize = 0x7FFFFFFF
 const minKeysPerPage = 2
 
 const branchPageElementSize = int(unsafe.Sizeof(branchPageElement{}))