Minor optimization to allocateSpace().

FossilOrigin-Name: d007bc339b9ea6d59a3dd2b0c5e77e9c801b16f6

1 files changed, 8 insertions, 3 deletions

diff --git a/src/btree.c b/src/btree.c
index 23af2570c..7dd714ea3 100644
--- a/src/btree.c
+++ b/src/btree.c
@@ -1440,9 +1440,14 @@ static int allocateSpace(MemPage *pPage, int nByte, int *pIdx){
   ** then the cell content offset of an empty page wants to be 65536.
   ** However, that integer is too large to be stored in a 2-byte unsigned
   ** integer, so a value of 0 is used in its place. */
-  top = get2byteNotZero(&data[hdr+5]);
-  if( gap>top || (u32)top>pPage->pBt->usableSize ){
-    return SQLITE_CORRUPT_BKPT;
+  top = get2byte(&data[hdr+5]);
+  assert( top<=pPage->pBt->usableSize ); /* Prevent by getAndInitPage() */
+  if( gap>top ){
+    if( top==0 && pPage->pBt->usableSize==65536 ){
+      top = 65536;
+    }else{
+      return SQLITE_CORRUPT_BKPT;
+    }
   }
 
   /* If there is enough space between gap and top for one more cell pointer