SQLite's recover.c should be valid C code

amalgamation/sqlite3.c

Index: amalgamation/sqlite3.c
===================================================================
--- amalgamation/sqlite3.c	(revision 291977)
+++ amalgamation/sqlite3.c	(working copy)
@@ -110889,6 +110889,8 @@
 /* Internal helper.  Reset storage in preparation for iterating pPage. */
 static void interiorCursorSetPage(RecoverInteriorCursor *pCursor,
                                   DbPage *pPage){
+  const unsigned knMinCellLength = 2 + 4 + 1;
+  unsigned nMaxChildren;
   assert( PageHeader(pPage)[kiPageTypeOffset]==kTableInteriorPage );
 
   if( pCursor->pPage ){
@@ -110909,8 +110911,7 @@
    * each child contains a 32-bit page number and at least a varint (min size of
    * one byte).  The final child page is in the header.
    */
-  const unsigned knMinCellLength = 2 + 4 + 1;
-  unsigned nMaxChildren =
+  nMaxChildren =
       (pCursor->nPageSize - kiPageInteriorHeaderBytes) / knMinCellLength + 1;
   if (pCursor->nChildren > nMaxChildren) {
     pCursor->nChildren = nMaxChildren;